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Please help me right away.

Please help me right away.-example-1

1 Answer

3 votes

we are given


x(t)=700-30t-15t^2

Average rate of change:

we can use formula


v(t)=(x(t)-x(0))/(t-0)


x(t)=700-30t-15t^2


x(0)=700-30(0)-15(0)^2


x(0)=700

now, we can plug value

and we get


v(t)=(700-30t-15t^2-700)/(t-0)

now, we can simplify it


v(t)=(-30t-15t^2)/(t)


v(t)=(t(-30-15t))/(t)

now, we can cancel t


v(t)=-30-15t

so, option-d.............Answer

User David Victor
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