The number of hours per day a college student spends on homework has a mean of 4 hours and a standard deviation of 0.75 hours. yesterday she spent 3 hours on homework. how many standard deviations from the mean is that?

What is the correct order of operations

Jill is a sales person for Mountain Transport. Every month she sells vehicles in this ratio one car for every six bicycles, and two motorcycles. Write an expression to determine the number of vehicles Jill sales every month.

How much is one taco shell if you have $2.99 divided by 20

Pam's eye-level height is 324 ft above sea level, and Adam's eye-level height is 400 ft above sea level. How much farther can Adam see to the horizon

The left and right page numbers on an open book add to 333. What are the page numbers? and

Solve for x. s=3w+2x

Andre wants to save $40 to buy a gift for his dad. Andre's neighbor will pay him weekly to mow the lawn, but Andre always gives a $2 donation to the food bank in weeks when he earns money.

The sum of consecutive integers 1,2,3, ..., n is given by the formula 1/2n (n+1). How many consecutive integers, starting with 1, must be added to get the sum of 1081

Two lines that intersect to form right angles are called what? A. Skew lines B. Line segments C. Perpendicular lines D. Parallel lines

In the United States, the number y (in millions) of bicycles sold with wheel sizes of 20 in. or greater can be modeled by the equation y = 0.3x + 15, where x is the number of years since 1981. In what year were about 22 million bicycles sold?