Geometric and Arithmetic word problems

If there are 122 bacteria in the petri dish and the bacteria double every minute, what is the equation for how many bacteria there will be in M minutes?

• f(m)= 122(3)^m

• f(m) = 3 (122)^m

• f(m) =122 (2)^m

• f(m) = 2 (122) ^m

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

If Lucky's pizza charges $2.25 per topping and $7 for a medium pizza, what is the equation for the cost of the pizza?

• f(t) = 2.25t + 7

• f(t) = 7 (2.25)^t

• f(t) = 2.25 (7)^t

• f(t) = 7t + 2.25

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

If a plumber charges $30 an hour and $76 for a trip charge, what is the equation for the cost of a plumber visit?

• f(x)= 76 x +30

• f(x) = 30x + 76

• f(x) = 30(76)^x

• f(x) = 76(30)^x

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

If Jamal invests $120 at 7% interest rate per year, how much will he have after 20 years?

• $464.36

• $4,877,077.69

• $956.40

• none of these

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

The value of a car depreciates 15% each year. If a new car is valued at $34,000, what is the equation for its value in T years?

• f(t) = 34000(1.15)^t

• f(t) = 34000(.85)^t

• f(t) = 34000 - .85t

• f(t) = 34000 - 1.15t

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

If a car depreciates in value at 20% each year, what is the value of a $25000 car in 5 years?

• $11,818

• $20, 833

• $20,000

• $8,192

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

There are 4 bacteria on a public bathroom handle. If the bacteria double every minute, how many bacteria are there in 30 minutes?

• 4,294,967,296

• 240,537,321

• 1,073,741,824

• 4,367,345,789

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1

Bonus question:

There are 5 bacteria on a spoon. If the bacteria triple every 30 seconds, how many bacteria are there in 10 minutes?

• 590,490

• 295,245

• 17,433,922,010

• 3,486,784,402

Tags

CCSS.MATH.CONTENT.HSA.CED.A.1