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123 7a Practice Test

Last updated almost 5 years ago
12 questions

Chapter 7a PRACTICE TEST

(L7-1, 7-2 & 7-8a)
  • Please do the problems, then submit. You may go back in to check (and change) your answers.
  • If you didn't finish your homework (DelatMath) yet, please finish it tonight.
1

Is it growth or decay?

1

For [1], what is the percent of increase/decrease?

1

Teen spending is expected to grow 6.8% annually from $97.7 billion in 2002.
Write the equation to model this situation.

1

How many billions is the expected amount of money that teens will spend in 2021?

1

Olivia invested $330 in an account paying an interest rate of 5.9% compounded monthly.
What is the equation?

1

Assuming no deposits or withdrawals are made, how much money, to the nearest dollar, would be in the account after 18 years?


For [7]-[12], to get full credit you must include the equation in the show your work space.

1

Isaac is going to invest in an account paying an interest rate of 3.9% compounded daily. How much would Isaac need to invest, to the nearest ten dollars, for the value of the account to reach $720 in 5 years?

1

Joseph invested $950 in an account paying an interest rate of 3\tfrac{3}{8}​% compounded continuously. Caleb invested $950 in an account paying an interest rate of 3\tfrac{1}{8}​% compounded daily. After 13 years, how much more money would Joseph have in his account than Caleb, to the nearest dollar?

1

Ariana invested $90,000 in an account paying an interest rate of 1.5% compounded continuously. Assuming no deposits or withdrawals are made, how long would it take, to the nearest year, for the value of the account to reach $113,000?

1

Addison is going to invest $49,000 and leave it in an account for 17 years. Assuming the interest is compounded continuously, what interest rate, to the nearest hundredth of a percent, would be required in order for Addison to end up with $93,000?

1

A new car is purchased for $42,000 and over time its value depreciates by one half every 3 years. What is the value of the car 10 years after it was purchased, to the nearest hundred dollars?

1

In a lab experiment, 310 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double every 30 hours. How long would it be, to the nearest tenth of an hour, until there are 440 bacteria present?

After you have submitted, and checked your answers, work on DeltaMath.