students' scores on an anthropology test have a mean of 31 with a standard deviation of 3.5 if rochelle scores 20 on her test, how many standard deviations away from the mean is her score

A scientist measured the length of a laboratory rat. It was 6.42 inches. The next time she measured it, the rat had grown to a length of 7.323 inches. How much did the length of the laboratory rat increase? A. 0.903 inches B. 1.103 inches C. 6.

What is 31/50 as a decimal

The probability of rain on any given day is 2/3. What is the probability of at most one day of rain during the next three days?

Tim can complete 168 math problems in six minutes. How many problems could he complete in one minute?

Lesley pours 1 carton of apple juice and 1 1/2 cartons of orange juice into another big jug, what is the ratio of apple juice to orange juice in lesley's jug Apple juice : orange juice

8x=25-9y - 13x=-35+9y

The area of a rectangle is 35 cm2 what could the length of the 4th sides be

What is the horizontal distance from the plane's starting position to its finishing position? Round your answer to the nearest tenth of a kilometer.

7/8 cup flour 1/8 tsp baking powder 2/8 tsp salt 4/8 cup butter 2 lg eggs 2/8 tsp vanilla extract Racheal needs to triple the recipe for her bake sale. How much of each ingredient does she need now?

How to model the expression (t-9) ?