Answer:
a. 50 weeks
Step-by-step explanation:
Americans spend an average of 3 hours per day online. If the standard deviation is 32 minutes, find the range in which at least 88.89% of the data will lie. Use Chebyshev's theorem. Hint: You should memorize that when k is 2, it is 75% and when k is 3 it is 88.89%. Also convert hours to minutes and state your answer in minutes.
Answer:
84 minutes to 276 minutes
Step-by-step explanation:
Chebyshev's theorem states that:
At least 3/4(75% ) of data falls within 2 standard deviation from the mean - that means between μ - 2σ and μ + 2σ
At least 8/9(88.89)% of data falls within 3 standard deviations from the mean - between μ – 3σ and μ + 3σ .
Where k > 1 , 1 - 1/k²
k is 2, it is 75% and when k is 3 it is 88.89%
Americans spend an average of 3 hours per day online. If the standard deviation is 32 minutes, find the range in which at least 88.89% of the data will lies
Step 1
Convert 3 hours to minutes
1 hour = 60 minutes
3 hours = x
Cross Multiply
= 3hours × 60 minutes/1 hour
= 180 minutes
We know from Chebyshev's theorem that:
At least 8/9(88.89)% of data falls within 3 standard deviations from the mean - between μ – 3σ and μ + 3σ .
Hence
μ = 180 minutes, σ =32 minutes
μ – 3σ
= 180 - 3(32)
= 180 - 96
= 84 minutes
μ + 3σ
= 180 + 3(32)
= 180 + 96
= 276 minutes
Therefore the range in which at least 88.89% of the data will lie is 84 minutes to 276 minutes
9 — 3x = у
3х – у = -2
Answer:
This could be wrong, but i still wanted to help you.
Step-by-step explanation:
9-3x=y
+9 +9
3x=y
÷3 ÷3
x=y/3
Im sorry if this is wrong
If f(x)=3x-7, find f(5). *
Answer:
f(5) = 8
Step-by-step explanation:
3(5)-7
15-7
8
Answer:
f(5)= 3(5) -7
f(5)= 15-7
f(5)= 8
Step-by-step explanation:
just substitute x for 5 and you get the answer
Solve 3(4m - 6) = 12 and explain each step
i need help with this geometry please
Answer:
how may i helps
Step-by-step explanation:
Write the equation of the line through the points (-3, 9) and (4, 2) in POINT-SLOPE FORM
Answer:
y-9=-1(x+3)
Step-by-step explanation:
The formula for point slope is y2-y1=m(x2-x1). So, we can use the values of the given points to solve the equation for m, or, the slope. We get an equation with the result of 2-9=m(4+3), which gives us the slope as -1. Now, substitute your xy values back in, to get the equation
2y = 1/4
find the value of y
Answer:
0.125
Step-by-step explanation:
2 * 0.125 = 0.25 (or 1/4)
Answer:
0.125
Step-by-step explanation:
I think not really good at it
work out the value of 2 ^ 0
Answer:
Anything to the 0 power is 1
Step-by-step explanation:
Answer:
2^0=1
Step-by-step explanation:
Sue used to have a square garage with 286 ft squared of floor space. He recently built an addition to it. The garage is still a square, but now it has 50% more floor space. What was the length of one side of the garage originally? What is the length of one side of the garage now? What was the percent increase in the length of one side?
Answer:
New Length = 20.71 feet
Original Length = 16.91 feet
22.47%
Step-by-step explanation:
Original area of the square garage = 286 ft squared
Addition of 50% more space
New area of the garage = 286 + .50(286)
= 286 + 143
= 429 square feet
What was the length of one side of the garage originally?
Original area of the square garage = 286 ft squared
Area of a square = length^2
286 = length^2
Find the square root of both sides
√286 = √length^2
Original Length = 16.91 feet
What is the length of one side of the garage now?
New area of the garage = 429 square feet
Area of a square = length^2
429 = length^2
Find the square root of both sides
√429 = √length^2
New Length = 20.71 feet
What was the percent increase in the length of one side?
(New length - old length) / old length × 100
= (20.71 feet - 16.91 feet) / 16.91 feet × 100
= 3.8 feet / 16.91 feet × 100
= 0.2247 × 100
= 22.47%
What is the sum of all the whole numbers from 1 to 1000?
Answer:
So there are 500 pairs of numbers that have a sum of 1001. Thus, the sum of numbers from 1 to 1000 is 500*1001 = 500,500.
Step-by-step explanation:
real life example of linear pairs
Answer:
Two angles are said to be linear if they contains a common ray and the sum of the two angles is equal to 180 degrees. A ladder placed against a building is a real life example of a linear pair.
Step-by-step explaination
hope this helped ✨
Is this rational or irrational? If so why ?
Answer: 0.12 repeating is a Rational number
Step-by-step explanation:
Any number with a terminating or repeating decimal representation is a rational number <!>Brainiest Appreciated<!>
‼️WILL LIST BRAINLIEST ‼️Explain the Error: Jayme tells her friend that ordered pairs that have an x-coordinate of O lie on the x-axis. She uses the origin as an example. Describe Jayme s error and why that statement is false,
Estimate the square root of 17 to the nearest tenth.
Answer:
4.1
Step-by-step explanation: Step 1: Calculate. We calculate the square root of 17 to be: √17 = 4.12310562561766.
Step 2: Reduce. 4.12.
Step 3: Round. Round 4.12 so you only have one digit after the decimal point to get the answer: 4.1.
What is x please help quick
Answer:
100
Step-by-step explanation:
180 - 136 = 44 (The unknown angle)
180 - 44 -36 = 100 = x
Find the measures of the labeled angles
Answer:
135 degrees \
Step-by-step explanation:
5x= x+108
Subtract x from the right
4x= 108
divide by 4
x= 27
Substitute for x in the original equation
(x+108)
(27)+(108)
= 135 degrees
f(n)=??? whats the answer mates?
Solve the inequality.−2(x − 3) − 4 ≥ 3x − 5(x − 1)
Answer:
0>3 i hope it helps
Step-by-step explanation:
Let's solve your inequality step-by-step.
−2(x−3)−4>3x−5(x−1)
Step 1: Simplify both sides of the inequality.
−2x+2>−2x+5
Step 2: Add 2x to both sides.
−2x+2+2x>−2x+5+2x
2>5
Step 3: Subtract 2 from both sides.
2−2>5−2
0>3
I WILL MARK YOU THE BRAINLYEST IF YOU HELP ME PLEASE!!!!!
The expression -50X+ 100 represents the balance in dollars of a bank account after X months.
What is the rate of change in dollars per month of the bank account balance?
A.) $100 per month
B.) $50 per month
C.) $-50 per month
D.) $-100 per month
Answer:
it's B
50(-x+2)
Answer:
hoesty ill pick c or a ut you risk it for the biscuit
Step-by-step explanation:
Hope this helps leave a heart pls ad if you have questios im here c:
does 55,808 have 2 as a factor ?
does 55,812 have 2 as a factor ?
does 55,814 have 2 as a factor ?
does 55,816 have 2 as a factor ?
does 55,818 have 2 as a factor ?
answer yes or no
Answer:
Yes.
Yes.
Yes.
Yes.
Yes.
Step-by-step explanation:
tomika ran 84 miles in 4 weeks. She ran 7 days each week. If she ran the same number of miles each day, how many miles did she run each day?
How to find rational numbers between any two numbers for example like finding six rational numbers between three and four please elaborate
Answer:
The whole series is:
3, 22/7, 23/7, 24/7, 25/7, 26/7, 27/7, 4
Step-by-step explanation:
Inserting Numbers Between Two Given Endpoints
Suppose we want to insert n equally-spaced numbers inside a given interval with endpoints [x,y].
To place n numbers, we need to open n+1 slots, at the end of which, a new number will be placed. The given interval is then divided into n+1 rational numbers of a value (y-x)/(n+1) each.
For example, let's add 6 rational numbers between 3 and 4. The width of the given interval is 4-3=1, and we need to place 6 numbers separated by 1/(6+1) = 1/7.
Start by the left endpoint:
3
The first number to add is 3+1/7=22/7
22/7
The second number to add is 22/7+1/7=23/7
23/7
The third number is 23/7+1/7=24/7
24/7
The next numbers follow the same pattern:
25/7
26/7
27/7
The last number is 28/7=4
4
The whole series is:
3, 22/7, 23/7, 24/7, 25/7, 26/7, 27/7, 4
We have inserted 6 rational numbers between 3 and 4.
Faith is driving to a concert and needs to pay for
parking. There is an automatic fee of $7 just to enter
the parking lot, and when she leaves the lot, she will
have to pay an additional $2 for every hour she had her
car in the lot.
Answer: $7 + 2h = Will be the price she pays when she leaves.
Step-by-step explanation:
Give the domain and range of the relation.
{(-6,5), (-6, -7), (5,-6), (6,-1), (-4,-5)}
A) domain= {5, 13,-4, 6, -6}; range = {-6, -5,-1, -7,5}
B) domain={-6, -5,-1, -7,5}; range = {5,5, -4,6,-6}
) domain= {5, -3, -4, 6, -6}; range = {-6, -5,-1,-7,5}
D) domain= {5,-4, 6, -6}; range = {-6, -5,-1,-7,5}
Answer:
D
Step-by-step explanation:
The domain is all the x values that are given with the points.
Domain(x)
Range(y)
Hope this helps! :)
The voltage V required for a circuit is given by [tex]v=\sqrt{PR}[/tex] , where P is the power in watts and R is the resistance in ohms.
How many more volts are needed to light a 100-watt light bulb than a 75-watt light bulb if the resistance of both is 110 ohms? Round answer to the nearest tenth.
Answer:
✓11000-✓8250=~ 14 volts
Step-by-step explanation:
the answer is the difference by 100-watt light bulb to a 75 light bulb.
so, all you have to do is this:
v1-v2--------> ✓PR-✓P2R2
so you'll have ✓100.110-✓75.110= ✓11000-✓8250= 14
I hope it helps
Need help asap! Tyy
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. . 。 。 .
. 。 ඞ 。 . • •
ﾟ Black was not An Impostor. 。 .
' 1 Impostor remains 。
ﾟ . . , . .
Answer:
27 feet squared
Step-by-step explanation:
the formula for the area of a triangle is b(h)/2 so u just plug in the numbers into the formula from the question. we know that the base is 6ft long and the height is 9ft long.
A = b(h)/2
A = 6(9)/2
A = 27
therefore the area of the sail is 27 feet squared.
You start reading a book for your literature class two day before your friend. You both read 10 pages per night. A system of linear equations that represents this situation is y=10x20 and y=10x. Will your friend finish the book before you?
Answer:
No
Step-by-step explanation:
You started two days before your friend and you both read the same numbers of pages every night. Therefore, you will finish two days before your friend.
The length of a rectangle is 6 feet and the width is 3 feet. Find the perimeter I
of the rectangle.
Line AB and line CD intersect at point E. If angle AEC= 5x and angle BED= x +28, font the value of x. (Number two)
Go to QuestionCove for better answers, it's too hard for me TwT
Answer:
2. x=7
3. x=11
Step-by-step explanation:
What is 15.5% as a fraction in simplest form
Answer:
Hope this helps
Step-by-step explanation:
15.5
10
(Computer won't do fractions so 15.5 out of 10 or 15.5 in decimal form)