Marilee takes all the money from her piggy bank and puts it into a savings account at her local bank. the bank promises an annual interest rate of 2.5% on the balance, compounded semiannually. how much will she have after one year if her initial deposit was $400?
a) $390.06
b) $420.25
c) $410.06
d) $420.50

which situation would be represented by a discrete probability distribution?
a) the thickness of an item
b) the lifespan of a fruit fly
c) the temperature of a solution
d) number of complaints a company receives in a day

the amount of money in a bank account that is compounded yearly can be represented by the function a(y) = p(1 + r)y, where p is the amount initially deposited, r is the annual interest rate expressed as a decimal, and y is the number of years that have passed since the initial deposit. $2,700 was deposited 14 years ago into a bank account that is compounded yearly, and no additional deposits or withdrawals have been made. if the amount of money now in the bank account is $7,930.42, what is the annual interest rate?
a) about 5%
b) about 6%
c) about 7%
d) about 8%

which type of data is best described by a continuous model?
a) points scored
b) pages in a book
c) children in a family
d) temperature of an engine