Exponential Growth and Decay

How many fruit flies are in the population after 7 days (1 week)?

• 140 flies

• 105 flies

• 101 flies

• 735 flies

A newly launched clothing line is rapidly increasing in popularity. Each month, 20% more clothing items are sold. If 89,090 items were sold this month, how many will be sold in 9 months? If necessary, round your answer to the nearest whole number.

• 74,278 items.

• 11,957 items.

• 319,226 items.

• 459,685 items.

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth

• Decay

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x

• y = 15(1.35)^x

• y = 15(0.35)^x

• y = 35(1.15)^x

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the decay factor? Hint: decay factor is (1-r) where r is the rate as a decimal

• ^.08

• ^1.08

• .92

• 8

You buy a new computer for $2100. The computer decreases by 50% annually. How much is it worth after 2 years.

• 225

• 325

• 425

• 525

Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)³

• Growth

• Decay

What type of function is y = 7(5/4)^x?

• Exponential Growth

• Exponential Decay

• Linear

• None of the above

Which of the following is a true statement about the two exponential graphs shown?

• The domain of f(x) is different from the domain of g(x)

• g(x) has a horizontal asymptote that is lower than the asymptote of f(x)

• The graphs have the same initial value

• The graphs have a different x-intercept

What is b, the common ratio, for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x