Unit 4 - LT8, 9, & 10 Review - Exponential Growth and Decay

Is this exponential growth or decay?

• Growth, because of 7
• Decay, because of 1.2
• Growth because of 1.2
• Decay because of 7

Tags

CCSS.HSF-IF.C.8B

Is this exponential growth or decay?

• Growth because a=1
• Decay because b=0.5
• Growth because there is no "a" value
• Neither because a=0

Pick the equation that is exponential growth

• y=2(0.5)^x
• y = 0.5(2)^x
• y = .5x - 2
• y = 2x + .5 

Pick the equation that is exponential decay

• y=2000(0.88)^x
• y=0.5(1.88)^x
• y=-4x
• y= -7+10x

The original value of a painting is $1400, and the value increases by 9% each year. Write an exponential growth function to model this situation.

• y=1400(1.09)^x
• y=1.09(1400)^x
• y=1400(.91)^x
• y=1.09^x

Tags

CCSS.HSF.LE.A.2

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

Tags

CCSS.HSF.LE.A.2

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation?

• y=8(15,000)^x
• y=15,000(1.08)^x
• y=15,000(0.92)^x
• y=15,000(0.08)^x

Suppose you deposit $3000 in a savings account that earns interest at an annual rate of 4%. No other money is added or withdrawn from the account. Does this situation represent exponential growth or decay?

• Exponential growth because 4% is bigger than one
• Exponential decay because 4% is less than one
• Exponential growth because you are earning interest
• Exponential decay because you are earning interest

Suppose you deposit $3000 in a savings account that earns interest at an annual rate of 4%. If no other money is added or withdrawn from the account, Which equation should be used to model the situation. (Write this equation down - you will use it in the next question)

• y=3000(4)^x
• y=3000(0.04)^x
• y=3000(1.04)^x
• y=3000(0.96)^x

Suppose you deposit $3000 in a savings account that pays interest at an annual rate of 4%. If no other money is added or withdrawn from the account, how much will be in the account after 10 years?

• $3122.18
• $4994.50
• $4440.73
• $86,776.40