Solve the differential equation

Step-by-step explanation:

We are given the first derivative of and the value of .

To go from the first derivative to the original function, we integrate.

Therefore:

To integrate, we add 1 to the power and divide by the new power:

Because we have an indefinite integral, we have to add the constant, , to the end.

So:

We know so we can find the constant .

Therefore

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

use formula for the circle a=3.14

step-by-step explanation: