You divide $90 by $2,000 to get 0.045%
If you multiply that % by $2,000 you get $90
Answer:

Step-by-step explanation:
Given
Amount
Required
The differential equation
The equation for the amount is:

Where:
initial amount
rate
time
Differentiate

So, we have:

From the question, we have: 
So, the equation becomes

Answer:
D
Step-by-step explanation:
Because x represents the number of minutes so you multiply that by 2 then add 4 to get the total
The square root of Pi is approximately 1.77245.