Exp and Log Review for Race to the End - Math 3

8,000 dollars is placed in a savings account with an annual interest rate of 3%. If no money is added or removed from the account, which equation represents how much will be in the account after 4 years?

• M = 8,000(1 + 0.03)

A radioactive compound with mass 400 grams decays at a rate of 5% per hour. Which equation represents how many grams of the compound will remain after 8 hours?

• C = 400(1 - 0.05)(1 - 0.05)

Tags

CCSS.HSF.BF.A.2

In a lab experiment, a population of 150 bacteria is able to triple every hour. Which equation matches the number of bacteria in the population after 4 hours?

• B = 150(3)(3)(3)

Tags

CCSS.HSF.LE.A.2

Francisco has a collection of vintage action figures that is worth $420. If the collection appreciates at a rate of 16% per year, which equation represents the value of the collection after 8 years?

• V = 420(1 + 0.16)(1 + 0.16)

An element with a mass of 790 grams decays by 19.5% per minute. To the nearest minute, how long will it be until there are 150 grams of the element remaining?

• 8

• 6

• 10

• 12

Tags

CCSS.HSF.LE.A.4

A new car is purchased for 15600 dollars. The value of the car depreciates at 12.75% per year. To the nearest tenth of a year, how long will it be until the value of the car is 3600 dollars?

• 10.8

• 8.5

• 12.3

• 9.7

Tags

CCSS.HSF.LE.A.2

Sam invested $67,000 in an account paying an interest rate of 3.9% compounded continuously. How much money, to the nearest dollar, would be in the account after 7 years?

• 88031

• 75000

• 92000

• 80000

Faith invested $4,100 in an account paying an interest rate of 2.6% compounded monthly. How long would it take, to the nearest year, for the value of the account to reach $5,290?

• 10

• 8

• 12

• 15

Tags

CCSS.HSF.LE.A.4

Lexa invested $54,000 in an account paying an interest rate of 4% compounded continuously. How long would it take, to the nearest year, for the value of the account to reach $106,200?

• 17

• 15

• 20

• 25