The number T of teams that have participated in a robot-building competition for high-school students over a recent period of time x(in years) can be modeled by T(x) = 17.155x^2 + 193.68x + 235.81, 0 ≤ x ≤ 6.

After how many years is the number of teams greater than 1000? Justify your answer.

Answers

Answer 1

Solving the quadratic equation, it is found that the number of teams is greater than 1000 after 3.1 years.

The number of teams after x years is given by:

[tex]T(x) = 17.155x^2 + 193.68x + 235.81[/tex]

Initially, there are T(0) = 236 teams. If will 1000 be when T(x) = 1000, thus:

[tex]17.155x^2 + 193.68x + 235.81 = 1000[/tex]

[tex]17.155x^2 + 193.68x - 764.19 = 0[/tex]

Which has coefficients [tex]a = 17.155, b = 193.68, c = -764.19[/tex], then:

[tex]\Delta = (193.68)^2 - 4(17.155)(-764.19) = 89950.66[/tex]

[tex]x_{1} = \frac{-193.68 + \sqrt{89950.66}}{2(17.155)} = 3.1[/tex]

[tex]x_{2} = \frac{-193.68 - \sqrt{89950.66}}{2(17.155)} = -14.3[/tex]  

We want the positive root, so the number of teams is greater than 1000 after 3.1 years.

A similar problem is given at https://brainly.com/question/10489198


Related Questions

Pete needs weight exactly 250 grams of sugar which method could Pete use to most accurately weight the sugar

Answers

Answer:

Well a scale or a food scale.

Step-by-step explanation:

Unless theres other options, a small Cale would work just fine

Patrick deposits $500 in a savings account, and he makes no deposits. How much money does Patrick have the savings account after 5 years?

Answers

He still has $500, unless there is some interest that wasn’t mentioned.

explain how your know that 88is a solution to the equation 1/8 R = 11 complete the sentences
The word solution means to
88 is a solution to 1/8 R = 11 because

Answers

Answer:

In this equation R would equal 88 because it satisfies the equation.

Step-by-step explanation:

You must solve for R by isolating the variable(which is R). To move the 1/8, multiply both sides by 8. You would do this because 8 is the reciprocal of 1/8. With R on it's own, to keep both sides equal multiply 11*8. That equals 88, which satisfies the equation, which is why 88 is the solution.

Hope this helps :)

In the interval 0° < x < 360°, find the values of x for which sin x = 0.6691 Give your answer tot he nearest degree

Answers

Answer:

x are 42 and 138degees

Step-by-step explanation:

Given the expression  sin x = 0.6691

sin x = 0.6691

Take the sin inverse of both sides

sin⁻¹(sin x) =  sin⁻¹(0.6691 )

x = sin⁻¹(0.6691 )

x = 41.99

x = 42 degrees (to the nearest degree)

Since sin theta is positive in the second quadrant;

x = 180 -theta

x = 180 - 42

x = 138degrees

Hence the value of x are 42 and 138degees

Which of the statements about the graph is true? :((

Answers

Answer: D / none are true

Since it's proportional (it's a straight line), B and C are automatically wrong. A would seem true at first glance, BUT if you look closely at the graph, the slope of the graph is actually 2x.

Look at the beginning of the line. It starts at 18 (x = 0/y intercept) and at x = 1, you can see that y is at 16. The y value goes down by 2 every time x increases by 1. This means that the equation of the graph is -2x + 18 = y.

The graph is proportional and has an equation of y = -2x + 18. This means that A, B and C are incorrect.

Answer:

Your answer is D.

Step-by-step explanation:

It is a straight line also known as proportional. The first impression, A appears to be accurate, but closer inspection reveals that the graph's slope is actually 2x. 18 (x = 0/y intercept) and ends at x = 1, where little y is at 16. Any time x expands by one, the y value falls by two. This says that the graph's equation is -2x + 18 = y.

one question please help!!! ill mark brainliest!!!!!!!

Answers

B would be the correct answer
I think b is the answer

Melanie invested $5,500 in an account paying an interest rate of 6.9% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest dollar, would be in the account after 11 years? Answer: 3562

Answers

Answer:

11749

Step-by-step explanation:

PLSSSSSSSSSSS HHELPP IM BEGGING YOU

Answers

Y=-1/4+4



(Y2-y1) (x2-x1)
y=1/4+4 because it wants to be

Drag the correct number of pieces to show how to find the area of the shaded figure in two different ways. Pieces can be rotated to fit.

Answers

Answer:

Step-by-step explanation:

As you can see from the attached picture below, the only figure that is equal to 5 whole units would be the final triangle. That is because it has 2 whole units in the middle, two half units in the top which equal 1 whole unit. And 2 units in each side corner which when combined would equal 2 whole units making it a total of 5. The rest of the shapes either hold more than 5 or less than 5 units. In the picture below, the top 3 shapes hold more than 5 units while the bottom two triangles hold less than 5.

helo me please please ​

Answers

i) Area = length x width

=250 x 100

= 25000 cm2

ii) it is a square so the sides are equal

Area = 10 x 10

= 100cm2

iii) 25000/100

250 tiles will be needed

Iv) one tile is 4.75 dollars

Total tiles are 250

Cost for tiling

=250 x 4.75

=1187.5

Hope this helps

Can someone help me? What is the solution for x-2 > 15 ?
Thank you!

Answers

Answer: X=17

Step-by-step explanation:

Answer:

Any number above 17

18 works.

Step-by-step explanation:

18-2 = 16

16 > 15

> means the number on the left is greater.

Hope this helps.

Simplify.
(6^2)^4
O 6^6
O 6^8
O 36^4
0 6^2

Answers

Answer:

its b and c dude

Step-by-step explanation:

Answer:

6^8

Step-by-step explanation:

Hope that helped!

Plz, mark brainiest, only 3 more till I level up!

Have a great day!!

Please help, I don’t understand this

Answers

Answer:

same here

have a nice day

help help help help help help

Answers

Answer:

1. B

2. =

3. 0.6, 1/2, -1.7, -1.75

4. Thomas won

. 5 (3 ⋅ 6) = (5 ⋅ 3) + (5 ⋅ 6

Answers

Answer:

they are not = to each other

Step-by-step explanation:

what does (-2,-3) look like on a graph

Answers

Answer:

looks like a line kinda

Step-by-step explanation:

If x - y=5, x + y = 59, and x > y, what is the value of xy?

Answers

Answer:

864

Step-by-step explanation:

∵X-Y=5    and.  

∵X+Y=59   add the two equations

∴2X=64

∴X=32 (substitute in any equation)

∴32 - Y=5

∴Y = 27

∴ So . X×Y=32 × 27=864

Answer:

x=32, y=27

Step-by-step explanation:

32-27=5

32+27=59

32>27

32x27=864

When Ben does his math homework, he finishes 10 problems every 7 minutes. At this rate, how long will
it take him to complete 35 problems?lols please help.

Answers

Answer:

in 7 minutes he solve 10 problems

he solve one problem in = 7/10= 0.7 minute

he solve 35 problem in = 0.7x35= 24.5 minute

Step-by-step explanation:

hope it helps ❤️

You pick a card at random. 6 7 8 9 What is P(not 9)? Write your answer as a percentage. %

Answers

Answer:

75%

Step-by-step explanation:

You pick a card at random. 6 7 8 9 What is P(not 9)? Write your answer as a percentage. %

Given the following

Total cards = 4 (6,7,8,9)

If the card is not 9, the required card will be (6,7,8)

Number of cards that are not 9 is 3

Probability = expected/total

Pr(not 9) = 3/4

express as percent

Pr(not 9) = 3/4×100

Pr(not 9) = 75%

Answer:

50%

Step-by-step explanation:

There are 4 cards, numbered 6, 7, 8, and 9. The numbers greater than 7 are 8 and 9. There are 2 numbers greater than 7.

P(greater than 7)  =  

2

4

Write your answer as a decimal. Then convert your answer to a percentage.

2

4

 =  0.5  =  50%

P(greater than 7) = 50%

Find the radius of each circle using 3.14
or 22/7 for pi. Round to the nearest tenth if
necessary.
Circumference =25.1 ft

Answers

Answer: The answer is 3.99 but I think you would just round it to 4.

3 5⁄7 + 1 9⁄14
helppppppppppppppppppppp

Answers

5 5/14

You can convert mixed fractions to solve it’s an easier method :)

Find the volume of a pyramid with a square base, where the area of the base is
8.3 mº and the height of the pyramid is 6.3 m. Round your answer to the nearest
tenth of a cubic meter.

Answers

Answer: 17.4 m^3

Step-by-step explanation:

V= 1/3 Bh

B=8.3

H=6.3

V=1/3 (8.3)(6.3)

V=17.43

V=17.4m^3

A deli is offering two specials. The roast beef special gives a profit of $2.30 per sandwich, and the turkey special gives a profit of $3.10 per sandwich. The roast beef special uses two slices of bread and three slices of cheese. The turkey special uses two slices of bread and four slices of cheese. The deli has 120 slices of bread and 160 slices of cheese available for the specials. The deli wants to maximize its profit selling specials. Let x represent the number of roast beef specials and y represent the number of turkey specials. What are the constraints for the problem?

Answers

Answer:

The constraints are as follows;

1) 2·x + 2·y ≤ 120

2) 3·x + 4·y ≤ 160

3) x = 2.30

4) y = 3.10

5) P = 2.3·x + 3.10

Step-by-step explanation:

The question is a word problem, with the analysis as follows;

The profit from the roast beef special per sandwich = $2.30

The profit from the turkey special per sandwich = $3.10

The number of slices of bread in the roast beef special = Two slices

The number of slices of cheese in the roast beef special = Three slices

The number of slices of bread in the turkey special = Two slices

The number of slices of cheese in the turkey special = Four slices

The number of slices of bread the deli has  = 120 slices

The number of slices of cheese the deli has = 160 slices

Let 'x' and represent the number of roast beef special and 'y' represent the number of turkey special the deli makes, then we have the constraints as follows;

For the number of slices of bread used;

2·x + 2·y ≤ 120...(1)

For the number of slices of cheese used;

3·x + 4·y ≤ 160...(2)

x = 2.30

y = 3.10

The profit 'P' is given by the following equation

P = 2.3·x + 3.10.

Answer:

its a

Step-by-step explanation:

trust

Help is needed, thank you so much!

Answers

Answer:

t=36

Step-by-step explanation:

54-18 = 36

Answer:

t + 18 = 54

Step-by-step explanation:

t + 18 = 54

subtract 18 from both sides

t = 36

The temperature during the night was 36 degrees

Hope that helps

6
Select all the expressions that equal 4×10

Answers

Answer:

40

Step-by-step explanation:

5 × 8 = 40

1 × 40 = 40

2 × 20 = 40

A can in the shape of a cylinder has a diameter of 6 centimeters and a height of 10 centimeters. Which measurement is closest to the total surface area of the can in square centimeters?
A - 603.19 cm2
B - 245.04 cm2
C - 376.99 cm2
D - 188.50 cm2​

Answers

Answer:

245.04 cm

Step-by-step explanation:

I'll give you a brainiest, but please help me with this question. I need help.

Answers

Hope it helps you!.......

Answer:

Angle B would be 56 degrees.

The x-coordinate of the vertex of the function y=-x²+bx+3 is 10. Determine the y-coordinate of the vertex.

Answers

Answer:

103

Step-by-step explanation:

Given function:

y = -x² + bx + 3

The x-coordinate of a quadratic function y = ax² + bx + c is determined by:

x = -b/2a

The given function has:

x = 10, and a = -1

Find the value of b:

10 = -b / -2b = 20

The function is:

y = -x² + 20x + 3

The y-coordinate of the vertex is:

y = -(10²) + 20*10 + 3 = -100 + 200 + 3 = 103

Answer:

Solution given:

y = -x² + bx + 3

we have

The x-coordinate of a quadratic function y = ax² + bx + c is determined by:

x = [tex] \frac{ - b}{2a} [/tex]

we have

x = 10, and a = -1

Substituting value of a in -b/2a

we get

b = 20

now

The y-coordinate of the vertex is:

y = -(10²) +20*10+ 3 = -100 + 200 + 3 = 103 is your answer.

Henry has a box of toys that weighs 7 pounds. He has another box of toys that weighs 84 ounces. How many ounces do both boxes weigh altogether?

Answers

Answer:

196 ounces

Step-by-step explanation:

1 pound = 16 ounces

16 x 7 = 112

112 + 84 = 196 ounces

PLEASEEEEEEEEEEE HELPPPPPPPPP WITH THISSSSSSSSS

Answers

Answer:

P = 10x + 2

Step-by-step explanation:

Formula to find perimeter:

P = 2(l + w)

P = 2(4x + 1 + x)

P = 2(5x + 1)

P = 10x + 2

Other Questions
Read the statements.Water bears are microscopic animals. When water bears are exposed to a vacuum of space, about 30% of them can survive. A scientist is doing an experiment on water bears and vacuum exposure.Which option is a prediction that relates the outcome of the scientists experiments with probability?1. The scientist thinks water bears can survive vacuum exposure because they have little water in their bodies. 2. The scientist thinks that under some conditions, up to 40% of the water bears can survive.3. The scientist thinks that there is a 15% chance that he will receive funding for more research.4. The scientist thinks that other animals can also survive vacuum exposure. helpppp........ please what property is -8(x-3)=-32 If the reaction occurs between Fe2S3(s) and H(aq) and the equation is properly balanced with thesmallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?Fe2S3(s) + H+ (aq)Please answer this mathematically. Some save me please will name brainliest if the answer is correct PLEASE HURRY 9. Your driver's license is at risk of being canceled if you:O A. Lied on the license application.O B. Are caught driving under the influenceO C. Cause an accident that injures another person.O D. Have more than three traffic violations in one year. How did james Chadwick know that neutrons are neutral ? What is your favorite passerifomes?Mine is all the corvids! Specifically the steller's jay This painting is showing the actions of American colonists at the 1773 protest known by what name? A) The Plymouth Rocks B) The Boston Massacre C) The Boston Tea Party D) The New York Draft Riots helppppppppppppppppppppppppp Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Select two options.1. Protons and neutrons have similar mass.2. Protons and electrons have similar mass.3. Neutrons and electrons have similar mass.4. Protons are smaller than a neutron or an electron.5. Neutrons are smaller than a proton or an electron.6. Electrons are smaller than a proton or a neutron. A client has several suppliers they purchase their materials from, and most of the suppliers require part or all payments to be made at the time of order. You advise your client to set up a Prepayments account that can be reconciled each month. How should this account be set up What strategies have you used to help push past hurdles in your own writing process? For BRAINILY please help Jannsnanamsmskakanan simplify the expression 8xy-(x+2xy)+3x Help me out here pleaseeeeeee Cause and Effects of the Battle of SaratogaASAP, THANK YOU! PLZ HURRY 100 POINTS PLUS BRAINLIESTHow was Rome ruled after General Sulla died?The Senate chose a new dictator to lead.A general took power from the triumvirate.The triumvirate took control of the government.The Senate held an election for the next leader. Question 17 of 22Which feature of the U.S. government is an expression of the concept offederalism?A. States have equal representation in the Senate but proportionalrepresentation in the House of Representatives.B. Certain powers are given to the federal government, while othersare reserved for the states.C. The powers of the federal government are divided into threebranches with a system of checks and balances.D. The Constitution is defined as the supreme law of the land.SUBMIT