Question

Please help @hero @perl @iambatman

Answer 1

I found the anti-derivative, but what do I do now?

Answer 2

put in t = 15 and hence calculate s(15), but this assume s(0) = 0, ie your constant of integration = 0.

Answer 3

I plugged in 15 and got 2625, which is not an answer choice

Answer 4

check your integration :p

share it here

Answer 5

???

Answer 6

OK, what do you get for s(t)?

Answer 7

(2/3)x^3 + x^2 + 10x + C

Answer 8

if you follow the question, it should be
\[\frac{0.2}{3} x^3\]

Answer 9

Oh, oops. I see what I did wrong. My calcualtor got 0.066666666666, and I mistook it as 2/3, and not 0.2/3

Answer 10

so do you now get the "right" answer?

Answer 11

approx 600?

Answer 12

exact 600, surely?

get a new calculator :p

Answer 13

lol, yeah, exactly 600. The first time I used 0.0666 to calculate

Answer 14

well done!