At the end of an advertising​ campaign, weekly sales amounted to ​$25,000 and then decreased by 10​% each week after the end of the campaign. a. Write the equation of the exponential function that models the weekly sales. b. Find the sales 6 weeks after the end of the advertising campaign.

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x