You invest $2000 in an account that pays simple interest of 3% for 20 years. what is the amount of money you'll have at the end of 20 years ?

Just simply multiply

2000*.03*20= 1200 then add

2000+1200= 3200
So you will have $3200 after 20 years

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.

20 percentage, you can also do it on a calculator.