Determining exponential growth and decay in exercise, use the given information to write an exponential equation for y. does the function represent exponential growth or exponential decay?
dy/dt = -4y, y = 30 when t = 0

Exponential decay.

Step-by-step explanation:

We are given that

y=30 when t=0

Taking integration on both sides then we get

By using the formula

Where

Substitute y=30 and t=0

Apply limit t tends to infinity

The value of function decreases with time therefore, it is an exponential decay.

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1

answer:   y=2x-3

step-by-step explanation: