Amir invest 4,000 in a 5 year cd paying 3.5% interest. how much interest will he make on the cd in 5 years? the simple interest formula is i=prt

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.