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The height,

`h`

, in meters of a projectile after

`t`

seconds can be represented by

`h(t)=-4.9t^(2)+115t+12.5`

a. What is the object's average rate of change over the interval

`0,10`

?

```
(h(10)-h(\theta ))/(10)=(-4.9(10)^(2)+115(10)+12.5+(-4.9(\phi )^(2)+115(\phi )+12.5))/(10)
=(660)/(10)=66
```

(b) What is the object's instantaneous velocity

`a+t=10`

? (c) What is the equation of the tangent line to

`h(t)`

at

`t=10`

(D) What is the object's accelerotion at

`E=10`

? (e) when is the object's instantaneous velocity equal to 0 ?