7. In some places, a suspension bridge is the only passage over a river. The height of one such bridge, h, in metres, above the riverbed can be modelled by h = 0.005x^2 + 24.a) How many zeros do you expect the relation to have? Why?
b) If the area was flooded, how high could the water level rise before the bridge was no longer safe to use?

I have answered a) but I don't know how to do b). The book says the answer is 24m if that helps. Any suggestions are appreciated.

Answers

Answer 1

Answer: Sure. The function is a parabola. Because the coefficient of the x^2 term is positive, it opens upward. that means that it vertex is a minimum point.

You can verify that the vertex is (0,24). That means that at the point x=0, the height of the bridge is 24m. So if the level water rises below 24 m, the bridge is safe to use.

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22 lb = ___ oz. How many ouces in 22 pounds

Answers

Since there are 16 ounces in a pound 22 you would do 22x16 so it would be 352 ounces

22×16=352 ounces There are 16 ounces in a pound

thomas drew a rectangle with an area of 6 square centimeters. what is possible perimeter for this rectangle

Answers

Hey There !

If Thomas drew a rectangle with an area of 6 than the perimeter is 10.

Work

3 (length) * 2 (width)= 6 (area)

length- 3+3 and width 2+2=10

So, (3*2)+(2*2)= 10

In conclusion, the perimeter is 10.

Have A Good Day !

3:4 = 15:20 True or False. Explain your reasoning.

Answers

the question is if the two proportions are equal:
3:4
= 3(5):4(5)
that is, we just multiply both sides of the proportion by the same number and so we have:
3:4
= 3(5):4(5)
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therefore:
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A musician's hair was originally 3 inches long she asked her hair dresser to cut 5/6 of it off how many inches did she have cut off

Answers

ok so first we will make 3 into 6 parts so each part is .5 or half of 1. Then to get 5 parts of it we do .5×5=which is 2.5 which shows that the musician cut off 2 1/2 inches of hair.

claudio will decorate his bedroom he can choose tan, blue, or gray paint and striped or plaid curtains how many ways can he decorate his room with different paint and curtains

Answers

5×5×5×5×5=3125

3,125 ways he can decorate his room with different paint and curtains.

Answer: 5×5×5×5×5=3125

Step-by-step explanation:this is the answer

A chicken casserole recipe serves 12people and calls for 3 cups of
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cups of spinach should you use?

Answers

Answer:

4.5 cups of spinach

Step-by-step explanation:

we know that

The recipe serves 12 people and calls for 3 cups of spinach

using proportion

Find out how many cups of spinach should you use, to serve 18 people

$(12)/(3)\ (people)/(cups) =(18)/(x)\ (people)/(cups)\n\nx=18(3)/12\n\nx=4.5\ cups$

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