Simplify the following. 81^3/4

Rewrite 8 2/5 as a decimal number

Half dollar has a diameter of about 31 mm about how many millimeters long would a roll of 56/2 dollars be

A red string of holidays lights blink once every 3 seconds while a string of lights blink every 4 seconds how many times will both sets of lights blink at the same time in 1 min

The sandbox at the playground is 2 ft tall. The area of the base of the sandbox is 80 square feet. How much sand does it take to fill the sandbox?

A radioactive material loses 25% of its mass in 10 minutes. find its half-life.

Evaluate f (-2) when f (x) = 5x + 3

Round 706,341 to the nearest hundred

Leonardo da vinci's mona lisa is 21 inches wide and 30.25 inches tall. what is the area of the painting in square centimeters?

How many grains of sand in a 10kg bag if one grain weighs 10 to the negative third gram

What is the reference angle of 135