Joan puts $400 into a bank account. Each year the account earns 7% simple interest. How much interest will be earned in four years?

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12