Thread: Very simple problem I'm having trouble with

1. Very simple problem I'm having trouble with

$f(x)=0.8x^2$ over the interval $0 \leq x \leq c$. Find c.

What do I do exactly..?

2. Am I correct in assuming that this is a probability density function?

If so, remember that probability density functions have an area of 1.

3. Originally Posted by Brokensound723
$f(x)=0.8x^2$ over the interval $0 \leq x \leq c$. Find c.

What do I do exactly..?
Solve for c: $\displaystyle \int_0^c 0.8x^2 \, dx = 1$.