Exponential and Logs Unit Test Review

Which function represents exponential growth?

You deposit $2000 in an account paying 8% annual interest, compounded quarterly. What is the balance in the account after 15 years?

• $1466.40

• $5009.87

• $1050.89

• $6562.06

At a wholesale food distribution center, the price of sugar has increased 3.3% annually since 1970. If sugar cost $0.28 per pound in 1970 and this growth continued, what did a pound of sugar cost in 2015?

• $5.25

• $1.21

• $3.67

• $7.30

• 1

• 1.5

• 2

• 2.5

Condense to a single logarithm: log₃ x + 3log₃ y

• log₃ xy³

• log₃ 3xy

• log₃ (x+y³)

• log₃ (x/y³)

• 0

• -1

• -2

• 3

• 2

• 1

• 9

• 3

• 0.5000

• 0.7500

• 0.6610

• 2.5000

Solve the equation: log₂ (5x+4) = log₂ (2x+9)

• 5/3

• −5/3

• 25

• -10

• 5.5

• 100