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Dvinal [7]
3 years ago
9

YOU RRR MEH HEROOOZZ! PUHLEASZEEE ITS 10:30pm!!

Mathematics
1 answer:
avanturin [10]3 years ago
8 0

Answer:

x(35)\approx 11.8

Step-by-step explanation:

<u>Modeling With Functions </u>

We have a table of values of speeds vs distance taken for a car to stop. We are required to find a model that uses the square root and fits the given data to predict other values of d as a function of v.

By the nature of the problem, we can know that for v=0, d must be 0 too. So our model won't include a vertical shift or independent term. Being v the speed of the car and x the distance it takes to stop, we use the following model

x(v)=A\sqrt{v}

We must find A to make the function fit the data. Let's use the first point (v,x); (20,9)

9=A\sqrt{20}

Solving for A

\displaystyle A=\frac{9}{\sqrt{20}}

A\approx 2

Then we have

x(v)=2\sqrt{v}

Evaluating for v=35

x(35)=2\sqrt{35}=11.83

\boxed{x(35)\approx 11.8}

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