The mass of a substance, which follows a continuous exponential growth model, is being studied in a lab. The doubling time for this substance was observed to be 7 hours. There were 23.3 mg of the substance present at the beginning of the study.

(a) Let t be the time (in hours) since the beginning of the study, and let y be the amount of the substance at time t. Write a formula relating y to t. Use exact expressions to fill in the missing parts of the formula Do not use approximations.
(b) How much will be present in 5 hours?

Step-by-step explanation:

-This is an exponential relationship where one of the variables contains an exponent component.

The general form of an exponential function is given as:

where:

#Given the initial population as 23.3mg, doubling time as 7hrs, we determine the growth rate as:

#Substitute r in the general equation for solving for amount at time t:

b. We use the amount at time t from a above,, to calculate the amount after 5hrs as:

Hence, the mass of the substance after 5hrs is 38.23 mg

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

what is the your question?