Posted by **Kyle** on Thursday, October 10, 2013 at 10:39pm.

The position s of a point (in feet) is given as a function of time t (in seconds).

s = −10 + t − 15t2; t = 8

(a) Find the point's acceleration as a function of t.

s''(t)=

I know this answer, it is -30

(b) Find the point's acceleration at the specified time.

s''(8) = I don't know this one

- Brief Calculus -
**Reiny**, Friday, October 11, 2013 at 12:19am
s = -10 + t - 15t^2

s' = v = 1 - 30t

s'' = a = -30 , which is a constant

so no matter what value of t you take, e.g. t = 30

there is no variable to sub into, so

a = -30

## Answer this Question

## Related Questions

- maths - I've put what i think are the answers at the bottom. Consider the ...
- maths - I've put what i think are the answers at the bottom. Consider the ...
- Calculus - Find the point on the line 6x + y = 9 that is closest to the point (-...
- calculus - Find an equation for the surface consisting of all points P(x, y, z) ...
- math calculus - Find the equation of the function f whose graph passes through ...
- biology - Given the part of the molecule shown below, can the underlined atom ...
- Pre-Calculus - Determine the derivative at the point (2,−43) on the curve ...
- Maths Vector Helpppp - The points A and B have position vectors, relative to the...
- calculus - please anyone help me out Consider the following. Function Point f(x...
- Calculus - The motion of a spring that is subject to dampening (such as a car's ...