i am stuck on my maths please help

Answer:

only [tex]\sqrt{101}[/tex] is irrational

Step-by-step explanation:

an irrational number cannot be expressed as a fraction

0.329 = 329/1000

127.5 = 1275/10

-89 = -89

[tex]\sqrt[3]{64}[/tex] = 4

The function to represent the bacteria population after t hours is f(t) = 7400 * [tex]e^(0.13/60 * t)[/tex].

A derivative is a measure of how much a function changes as its input value changes. It is defined as the limit of the rate of change of the function with respect to its input as the change in the input approaches zero.

The function to represent the bacteria population after t hours, where the function's constant can be used to calculate the rate of change per minute is:

f(t) = 7400 * [tex]e^(0.13/60 * t)[/tex]

where:

f(t) = population of bacteria after t hours

e = Euler's number (approximately 2.71828)

t = time in hours

0.13/60 = rate of change per minute (converted from 13% per hour)

To determine the percentage rate of change per minute, we can calculate the derivative of the function with respect to time (t):

df/dt = 7400 * 0.13/60 * [tex]e^(0.13/60 * t)[/tex]

At t = 0 (the start of the experiment), the rate of change per minute is:

df/dt = 7400 * 0.13/60 * [tex]e^(0.13/60 * 0)[/tex] = 12.1166

To express this rate of change as a percentage, we can divide it by the initial population and multiply by 100:

rate of change per minute = (df/dt) / P(0) * 100% = 12.1166 / 7400 * 100% = 0.1638% (rounded to the nearest hundredth of a percent)

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Answer:

Step-by-step explanation:

3/5 x 100= 60%

Using Trigonometric functions, the height of the tree is approximately 50.6 feet.

Let's call the height of the tree "h" and the distance between the forester's original position and the base of the tree "x". Then, when the forester moves 20 feet closer to the tree, the distance between the new position and the base of the tree is "x - 20".

We can use the tangent function to set up two equations relating the height of the tree to the angles of elevation:

tan(37°) = h/x ...(1)

tan(52°) = h/(x - 20) ...(2)

We can solve this system of equations to find the value of "h". First, we can rearrange equation (1) to get:

x = h/tan(37°)

Then, we can substitute this expression for "x" into equation (2) and solve for "h":

tan(52°) = h/(h/tan(37°) - 20)

Simplifying and solving for "h", we get:

h = (20 tan(52°) tan(37°)) / (tan(52°) - tan(37°))

Using a calculator, we can evaluate this expression and find that:

h ≈ 50.6 ft

Therefore, the height of the tree is approximately 50.6 feet.

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In a game of chance, the probability of winning 50 is 40 percent and the probability of having to pay 50 is 60 percent. Therefore, the expected value of this game is -10. The correct answer is option A.

To find out what the expected value of this game is, we will need to use the formula:

Expected value (E) = (probability of winning x amount won) - (probability of losing x amount lost)

Let's substitute the values given in the question:

Probability of winning = 0.4

Amount won = 50

Probability of losing = 0.6

Amount lost = 50

Expected value (E) = (0.4 x 50) - (0.6 x 50)

                               = 20 - 30

                               = -10

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Answer:

£2947

Step-by-step explanation:

the formula for simple interest is interest = prt.

p is the principal value, or what omar had at the beginning.

r is the rate at that you gain interest.

t is the amount of time in years.

so, plugging in our values, we multiply 2800*3*0.0175 to get 147.

now, since that was the amount of interest omar gained, we still have to add the original amount that he had, and 2800+147 = 2947.

so, the answer is £2947.

Answer:

0.96%

Step-by-step explanation:

do not answer with 0.966% it WILL be wrong and is a VERY common calculation error due to a very small mistake

Answer: To write 6^-5 in expanded form, we need to first recall the definition of negative exponents. If a number a is raised to a negative exponent, it means that we take the reciprocal of a raised to the absolute value of the exponent. In other words:

a^(-n) = 1 / a^n

Using this definition, we can write:

6^-5 = 1 / 6^5

Now, we can expand 6^5 using repeated multiplication or by using a calculator. 6^5 means 6 multiplied by itself five times:

6^5 = 6 × 6 × 6 × 6 × 6 = 7776

Therefore, we can write:

6^-5 = 1 / 6^5 = 1 / 7776

So, the expanded form of 6^-5 is 1/7776.

Step-by-step explanation:

Answer:

[tex]22^\circ + m\angle C = 90^\circ[/tex]

Step-by-step explanation:

Pre-Solving:

We are given that [tex]\angle A[/tex] (which is equal to 22°) and [tex]\angle B[/tex] are vertical angles, and that [tex]\angle B[/tex] is complementary to [tex]\angle C[/tex].

We want to write an equation that will help us solve [tex]\angle C[/tex].

Solving:

Recall that vertical angles are congruent by vertical angles theorem.

This means that [tex]\angle A \cong \angle B[/tex]; it also means that the measure of [tex]\angle B[/tex] is also 22°.

Also recall that complementary angles add up to 90°.

This means that [tex]m\angle B + m\angle C = 90^\circ[/tex].

Since we deduced that [tex]m\angle B[/tex] is 22°, we can substitute that value into the equation.

Hence, an equation that can be used to solve for [tex]\angle C[/tex] is:

[tex]22^\circ + m\angle C = 90^\circ[/tex]

Answer:

m∠A = m∠B

m∠A = 22°

m∠B + m∠C = 90°

Step-by-step explanation:

∠A and ∠B are vertical angles. (Given)

By definition of vertical angles, a pair of angles with the same vertex and that are on opposite sides of two intersecting straight lines are congruent.

It is given that ∠A is 22°, and is a vertical angle with ∠B.

∴ ∠A ≅ ∠B (Definition of Vertical Angles).

IF m∠A = 22° and ∠A ≅ ∠B, THEN m∠B = 22° (Transitive Property of Equality).

∠B is complementary with ∠C (Given)

m∠B + m∠C = 90° (given).

m∠B = 22° (⇒Transitive Property of Equality)

Plug in 22 for m∠B in the given equation:

22 + m∠C = 90

Isolate the term, m∠C. Note the equal sign, what you do to one side, you do to the other. Subtract 22 from both sides of the equation:

m∠C + 22 (-22) = 90 (-22)

m∠C = 90 - 22

m∠C = 68°

~

Therefore, your system of equation will be:

m∠A = m∠B

m∠A = 22°

m∠B + m∠C = 90°

~

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The length οf the bar that shοuld be inserted tο make the ring fit the finger is apprοximately 12.57 millimeters.

Length οf bar = π × (new diameter - οriginal diameter), where π is the cοnstant pi, and new diameter and οriginal diameter are in millimeters.

The οriginal diameter οf the ring is 20 millimeters, and the new diameter that the ring needs tο fit is 16 millimeters.

Therefοre, the length οf the bar that shοuld be inserted is:

length οf bar = π × (16 - 20)

= π × (-4)

≈ -12.57 millimeters

Since the length οf the bar cannοt be negative, we can assume that it shοuld be 12.57 millimetres lοng.

Therefοre, the length οf the bar that shοuld be inserted tο make the ring fit the finger is apprοximately 12.57 millimeters.

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The smallest number of eggs that could have been in the basket = 301

Given that the basket is filled with an unknown number of eggs.

Let N be the smallest number of eggs in the basket.

When eggs are removed 2, 3, 4, 5, or 6 at a time, one egg is left over at the end which means (N-1) is divisible by 2, 3, 4, 5, or 6, i.e. (N-1) is the least common multiple of 2, 3, 4, 5, and 6.  

Since LCM (2, 3, 4, 5, 6) = 60

So, (N-1) should be a multiple of 60, then only (N-1) will be divisible by 2, 3, 4, 5, and 6. Therefore N is of the form 60k+1 (where k is an integer).

Since no egg is left over when they are removed 7 at a time, N should be a multiple of 7. Smallest multiple of 7 that is of the form 60k+1 (where k is an integer) is 301.

Hence the smallest number of eggs that could have been in the basket = 301.

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Answer:

can you like write it out normally please, i can answer it then

Step-by-step explanation:

The probability that your mail will be delivered before 2 pm for 2 consecutive days is 0.81.

Given,

The probability that your mail is delivered before 2 pm is 0.90.

To find:The probability that your mail will be delivered before 2 pm for 2 consecutive days

Probability that your mail will be delivered before 2 pm for 1 day = 0.90

Probability that your mail will be delivered before 2 pm for 2 consecutive days = P(1st day before 2pm) and

P(2nd day before 2pm)P(1st day before 2pm) and P(2nd day before 2pm) = 0.90 × 0.90= 0.81

Hence, The probability that your mail will be delivered before 2 pm for 2 consecutive days is 0.81.

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Answer:

n=6 sides

Step-by-step explanation:

We know that the sum of Interior angles of Polygon = 180(n-2)

Sum of Exterior angles of Polygon = 360

so 180(n-2)=2x360

Therefore, by solving we get n=6 sides.

The number of sides of a regular polygon is 6 sides.

The formula for calculating the sum of interior angles is (n-2)×180° where is the number of sides. All the interior angles in a regular polygon are equal. The formula for calculating the size of an interior angle is: interior angle of a polygon = sum of interior angles ÷ number of sides.

Given that, the sum of the measures of its interior angles is twice the sum of the measures of its exterior angles.

We know that, the sum of the measures of its exterior angles is 360°.

Now, the sum of the measures of its interior angles

= 2×360°

= 720°

Now, (n-2)×180°=720°

n-2=4

n=6

Therefore, the number of sides of a regular polygon is 6 sides.

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Answer:  A. x= 12 and -2

Step-by-step explanation:

x-5= 7  Solve for positive answer

x= 7+5=12

x-5= -7 Solve for negative answer

x= -7+5=-2

The length of RS is approximately 73 meters (to the nearest meter).

What is Law of sines ?

The Law of Sines is a trigonometric formula that relates the side lengths of a triangle to the sine of its angles. It states that in any triangle ABC:

a / sin(A) = b / sin(B) = c / sin(C)

where a, b, and c are the side lengths of the triangle, and A, B, and C are the opposite angles.

This formula can be used to solve for the unknown sides or angles of a triangle when given enough information about the other sides and angles. The Law of Sines is especially useful when dealing with triangles that are not right triangles, or when only a few side lengths and angles are known.

According to the question:

We can solve this problem by using the Law of Sines and the fact that the sum of the angles in a triangle is 180 degrees.

First, we can find the measure of angle A in triangle ABC:

A = 180 - 48 - 48 = 84 degrees

Next, we can use the Law of Sines to find the length of side AC:

sin(84) / 50 = sin(48) / AC

AC = sin(84) * 50 / sin(48) ≈ 64.4

Now, we can use the fact that the sum of the angles in triangle AQS is 180 degrees to find the measure of angle QAS:

QAS = 180 - 20 - 90 = 70 degrees

Finally, we can use the Law of Sines again to find the length of RS:

sin(70) / RS = sin(48) / AC

RS = sin(70) * AC / sin(48) ≈ 72.6

Therefore, the length of RS is approximately 73 meters (to the nearest meter).

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The 280 square foot lawn is in the designated area of a rectangular park that the city mayor wishes to use for gardening.

An object's area is how much space it takes up in two-dimensions. It is the measurement of the quantity of unit squares that completely cover the surface of a closed figure.

The square-unit, which is frequently expressed as square inches, square feet, etc., is the accepted unit of area.

The rectangular park's allocated area is intended to be used by the city's public school for gardening courses.

The remaining area of the park will be developed into a lawn.

What is the lawn's formula?

The lawn's area is equal to the sum of its triangular and rectangle areas.

Lawn Area = 14 × 16 +.5 × 8 × 14

A = 224 + 56

A = 280 Ft²

Therefore, the correct option is 280ft² which is option C.

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The part 7 is closed and the part 8 is not closed where as the part 6 is neither open nor closed.

What is close polynomial and open polynomial?

The terms "closed polynomial" and "open polynomial" are not commonly used in mathematics. However, we can talk about sets of polynomials being open or closed.

In general, a set of polynomials is said to be open if, for any polynomial in the set, there is a small "neighborhood" of polynomials around it that is also contained in the set. Intuitively, this means that the set "opens up" in all directions around any point in the set.

A set of polynomials is said to be closed if it contains all of its limit points. In other words, if a sequence of polynomials in the set converges to a polynomial outside of the set, then that polynomial must be added to the set to make it closed.

For example, the set of all quadratic polynomials with a nonzero discriminant is closed under addition, scalar multiplication, and multiplication of polynomials, so it is a closed set. The set of all cubic polynomials with real coefficients is an open set, since for any cubic polynomial, we can find a small "neighborhood" of cubic polynomials around it by adjusting the coefficients slightly.

6.The polynomial set {(x² + x − 4) - (x²+x+8)} is equivalent to the set {-12}. A single point set like this is neither open nor closed in the usual topologies on the real numbers.

7.The polynomial set (2-x)(1 + 3x) is the set of all polynomials of degree at most 2 with a leading coefficient of -3. This set is closed under addition, scalar multiplication, and multiplication of polynomials, so it is a closed set.

8.The polynomial set (5b-3c)(7b - 3c) is equivalent to the set {25b² - 36bc + 9c²}, which is the set of all quadratic polynomials in b and c with a nonzero discriminant. This set is not closed under addition, since the sum of two polynomials in this set can have a zero discriminant. Therefore, it is not a closed set.

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The odds of answering at least 9 questions correctly out of 15 by choosing at random is approximately 0.120

To solve this problem, we can use the binomial distribution, which models the probability of getting a certain number of successes in a fixed number of independent trials, each with the same probability of success.

In this case, we have 15 independent trials (the 15 questions) and the probability of success in each trial is 1/4 (the probability of guessing the correct answer among 4 choices). We want to find the probability of getting at least 9 successes.

Using a binomial distribution calculator, we can calculate this probability as

P(X ≥ 9) = 1 - P(X < 9) = 1 - binomcdf(15, 1/4, 8) ≈ 0.120

where binomcdf is the cumulative distribution function of the binomial distribution, which gives the probability of getting up to a certain number of successes (in this case, up to 8). The complement of this probability (1 minus the probability of getting up to 8 successes) gives the probability of getting at least 9 successes.

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The mirror line will be on -2 on the x axis. Then from that, you reflect the shape

The theoretical probability is 0.5 and the experimental probability is 0.583

Part A:

Since the coin is fair, the probability of it landing on heads is 0.5 or 50%.

The theoretical probability of a fair coin landing on heads is 0.5.

Part B:

Let's denote the outcome of flipping the coin as H (heads) or T (tails). We flip the coin 12 times and record the frequency of each outcome:

NB: This is an assumption and not a given data;

Outcome Frequency

    H              7

    T                      5

The experimental probability of landing on heads is calculated by dividing the number of times the coin landed on heads by the total number of coin flips:

Experimental probability of landing on heads = number of heads / total number of flips

Experimental probability of landing on heads = 7 / 12 = 0.583

Part C:

Comparing the experimental probability to the theoretical probability, we can see that they are different. The theoretical probability is 0.5, while the experimental probability is 0.583. This difference can be attributed to the randomness of the coin flips and the fact that we only flipped the coin 12 times, which is a relatively small sample size. As we increase the number of coin flips, the experimental probability should converge to the theoretical probability.

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Answer:

x=m+10

Step-by-step explanation:

Ur just making it into an equation

:)

The relation is not function . Because C)No; three range values exist for domain value 3.

What is function?

A mathematical phrase, rule, or law that establishes the link between an independent variable and a dependent variable (the dependent variable). In mathematics, functions exist everywhere, and they are crucial for constructing physical links in the sciences.

The given coordinates are {(3, –1), (3, 0), (–3, 4), (3, 8)}.

Here if 3 is output and -1 is input. We know that every function should have unique output.

In the given coordinates , we have 3 for three values.

Hence the correct option is C)No; three range values exist for domain value 3.

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Step-by-step explanation:

The area of the rectangle can be calculated by multiplying its length and width. In this case, the length is 17 units and the width is 4 units.

Area = Length x Width

Area = 17 x 4

Area = 68 square units

Therefore, the area of the rectangle is 68 square units.

a. To rationalize the expression √√√4 + x = 3 3, we need to get rid of the cube roots in the denominator.

First, we simplify the cube root of 4:

√√√4 = √√2

So, our expression becomes:

√√2 + x = 3 3

To get rid of the cube root in the denominator, we need to multiply both sides by the conjugate of the denominator:

(3 - √2)(√√2 + x) = 3

Expanding the left side:

3√√2 + 3x - 2√2 - √2√√2x = 3

Simplifying:

3x - 2√2 - √2√√2x = 3 - 3√√2

Combining like terms:

(3 - √2)x = 3 - 3√√2 + 2√2

Simplifying:

(3 - √2)x = (3 + 2√2) - 3√√2

Dividing both sides by (3 - √2):

x = [(3 + 2√2) - 3√√2]/(3 - √2)

Simplifying:

x = (3 + 2√2)(3 + √2)/7

b. To rationalize and solve for x in the expression 1-√2:

We need to get rid of the radical in the denominator by multiplying both the numerator and denominator by its conjugate:

1 - √2 / 1 - √2 * 1 + √2 / 1 + √2

Simplifying, we get:

(1 - √2)(1 + √2) / (1 - √2)(1 + √2)

= 1 - 2

= -1

So, x = -1.

Therefore, the rationalized expressions are:

a. √√2 + x = (3 + 2√2)(3 + √2)/7

b. 1-√2 = -1

Answer:

1/2 + 1/8 + 1/3 + 1/2 + 1/8 + 1/3 = 23/12 = 1 (11/12)

Therefore, the bumblebee bat is 0.5 centimeters shorter than the Etruscan pygmy shrew.

Inequalities are used in many areas of mathematics, including algebra, calculus, and geometry. They are also used in other fields such as economics, physics, and engineering to model real-world situations where values can vary within certain bounds. Solving inequalities involves finding the set of values that satisfy the inequality. This can be done using algebraic techniques such as adding or subtracting the same quantity from both sides of the inequality, multiplying or dividing both sides of the inequality by a positive number, or using the properties of absolute value. The solution to an inequality is often expressed as an interval or a set of numbers that satisfy the inequality.

Here,

According to the Guinness World Records, the bumblebee bat is the smallest mammal in the world, measuring only about 3 centimeters in length, while the Etruscan pygmy shrew measures about 3.5 centimeters in length.

To find out how much shorter the bat is than the shrew, we can subtract the length of the bat from the length of the shrew:

3.5 cm - 3 cm = 0.5 cm

The bumblebee bat and the Etruscan pygmy shrew are both very small mammals, but the bumblebee bat is actually shorter than the Etruscan pygmy shrew.

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Answer: 55

Step-by-step explanation:

I believe you are talking about a triangle.

This is soo easy, you got this you professional.

Find x:

10 + 4x-5+ + 2x - 5 = 180

Add like terms

6x = 180

x=30

Find BC:

2(30) - 5

55

BC = 55