Tony calculates that 3 cubic metres of concrete is enough for the path. He decides to use a concrete mix which has:

cement = 1 part

sand = 2 parts

gravel = 3 parts

How many cubic metres of gravel does Tony need?

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]