The ratio of the heights 1.50 cm and 75 cm of two person can be written as

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.

An expression for the average of x 2x and 3y