math (interests & percentss)
posted by bree .
i need help with these problems below !
mike deposited $500 for 9 months at 8%, compounded quarterly.
a. how many times was interest added to mike's account?
b. what percent interest was added each time?
c. what was the balance in mike's account at the end of 9 months?
sara deposited $1400 for 1 year at 10%, compounded semiannually.
a. how many times was interest added to sara's account?
b. what percent interest was added each time?
c. what was the balance in sara's account at the end of one year?
i don't understand how to do these problems so please explain & show work.

prealgebra (interests & percentss) 
chris
$21.60
Respond to this Question
Similar Questions

Math
Please check my work, thank you If $7,800 is deposited into an account paying 6% interest compounded annually (at the end of each year), how much money is in the account after 2 years? 
math 10
Theo deposited $1,250 in a savings account that pays 6% interest, compounded quarterly. What was his balance at the end of the second quarter after the interest had been added? 
math
We deposited 7,500 dollars into a savings account which pays 3.6 percent annual interest, compound quarterly.How long after the money is deposited will the account balance be 9,750 dollars? 
Math
Lee Holmes deposited $16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,600 at 9% interest compounded semiannually. At the end of year 6, what is the … 
math
Huan deposited $850 into a collegesavings account earning 4.8% interestcompounded annually. He also deposited$850 into a second account earning 4.8%simple interest. He made no additionaldeposits. After 10 years, which account earnedmore … 
MATH HELP! Complex Interest
Huan deposited $850 into a collegesavings account earning 4.8% interestcompounded annually. He also deposited$850 into a second account earning 4.8%simple interest. He made no additionaldeposits. After 10 years, which account earnedmore … 
Lat math question for some days. Can y'all help?
Huan deposited $850 into a college savings account earning 4.8% interest compounded annually. He also deposited $850 into a second account earning 4.8% simple interest. He made no additional deposits. After 10 years, which account … 
Math
1. When their child was born, Elaine and Mike Porter deposited $5,000 in a savings account. The money ears interest at 6 percent compounded quarterly. How much will the account be worth when their child celebrates her second birthday? 
math
Mike's grandmother opened a savings account in Mike's name and deposited some money into the account. The account pays an annual simple interest rate of 11%. After 13 years, the interest earned on the account is $5720. How much money … 
damon i need your help again
Julie deposited $300 into a simple interest savings account that earns 1.34%. If no money is added or withdrawn from the account, about how long will it take for the interest to equal the deposited amount?