Marilyn collects old dolls. She purchases a doll for $450. Research shows this doll's value will increase by 2.5% each year. Write an equation that determines the value, V, of the doll t years after purchase.

• V(t) = (1 + 0.025)^t

• V(t) = (1 - 0.025)^t

• V(t) = (1 + 2.5)^t

• V(t) = (1 - 2.5)^t

Tags

CCSS.HSF.LE.A.2

A car was purchased for $25,000. Research shows that the car has an average yearly depreciation rate of 18.5%. Create a function that will determine the value, V(t), of the car t years after purchase.

• V(t) = 25000(1 - 0.185)^t

• V(t) = 25000(1 + 0.185)^t

• V(t) = 25000(1 - 18.5)^t

• V(t) = 25000(1 + 18.5)^t

Tags

CCSS.HSF.LE.A.2

The rabbit population started at 65,000 rabbits. The population is decreasing at a rate of 1.5% each year. Write a function r(t) to represent the rabbit population after t years.

• r(t) = 65000(1 - 0.015)^t

• r(t) = 65000(1 + 0.015)^t

• r(t) = 65000(1 - 1.5)^t

• r(t) = 65000(1 + 1.5)^t

Tags

CCSS.HSF.LE.A.2

Miles bought a new boat for $20,000 in 2000. The value of the boat depreciates 8.5% every year. What would the value of Miles' boat be in 2009? (Let 2000 be year 0.)

• $4.63

• $8991.24

• $8991.25

• $41677.11

Ashton has 2 rabbits. The number of rabbits triples every year. Ashton needs 100 pounds of food to feed one rabbit per year. How many pounds of food will Ashton need to feed his rabbits during the third year?

• 1800

• 1200

• 900

• 600

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. In about how many months will the mosquito population reach 8,000?

• 3

• 3.5

• 4

• 5

In a laboratory, they were testing a certain bacteria. They started with 50 bacteria and they noticed it doubles every hour. How many hours will it take for the bacteria to increase to 51,200?

• 51

• 5

• 50

• 10

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

• Exponential Growth
• Exponential Decay
• Linear
• None of the above

Tags

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.3

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

Tags

CCSS.HSF.LE.A.2

If the number of illnesses at RHS doubles every week, and there were 4 sick students to begin with, write an equation relating y (the number of new illnesses) and x (the number of weeks).

• y=(2)^x
• y=2(4)^x
• y=4(2)^x
• y=4^x

Tags

CCSS.HSF.LE.A.2