Y+8=x/2 linear or nonlinear

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.