For [1], what is the percent of increase/decrease?
Question 3
3.
Teen spending is expected to grow 2.3% annually from $87.6 billion in 2004.
Write the equation to model this situation.
Question 4
4.
How many billions is the expected amount of money that teens will spend in 2024?
Question 5
5.
Ryan invested $257 in an account paying an interest rate of 3.9% compounded weekly.
What is the equation?
Question 6
6.
Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, 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.
Question 7
7.
Brayden is going to invest in an account paying an interest rate of 4.3% compounded monthly. How much would Brayden need to invest, to the nearest ten dollars, for the value of the account to reach $1,830 in 19 years?
Question 8
8.
Ellie invested $13,000 in an account paying an interest rate of 8\tfrac{1}{4}% compounded continuously. Daniel invested $13,000 in an account paying an interest rate of 8\tfrac{1}{2}% compounded daily. After 18 years, how much more money would Daniel have in his account than Ellie, to the nearest dollar?
Question 9
9.
Lily invested $90,000 in an account paying an interest rate of 4.6% compounded annually. Assuming no deposits or withdrawals are made, how long would it take, to the nearest year, for the value of the account to reach $221,200?
Question 10
10.
Ella is going to invest $18,000 and leave it in an account for 8 years. Assuming the interest is compounded continuously, what interest rate, to the nearest hundredth of a percent, would be required in order for Ella to end up with $22,000?
Question 11
11.
Element X is a radioactive isotope such that every 23 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 80 grams, how much of the element would remain after 21 years, to the nearest whole number?
Question 12
12.
In a lab experiment, 30 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double every 6 hours. How many bacteria would there be after 19 hours, to the nearest whole number?