# Math Help - How to solve for c and d?

1. ## How to solve for c and d?

Use the law N = c(t)^d

at t = 1, N = 1.7
at t = 2, N = 2.4
at t = 3, N = 2.9
at t = 4, N = 3.4

Solve for c and d.

I've been trying to do this for a while, but not sure how to solve it.

2. Originally Posted by AlphaRock
Use the law N = c(t)^d

at t = 1, N = 1.7
at t = 2, N = 2.4
at t = 3, N = 2.9
at t = 4, N = 3.4

Solve for c and d.

I've been trying to do this for a while, but not sure how to solve it.
HI

Are c and d both constants ? If so ..

$N=ct^d$

When t=1 , N=1.7

$1.7=c(1)^d$ , one to the power of anything would give you 1 .

c=1.7

at t = 2, N = 2.4

$2.4=1.7(2)^d$

$1.41=2^d$

$d=\frac{\ln 1.41}{\ln 2}$