Explain how you can use doubles when multiplying with 4 to find 4x8

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Is the power produced directly proportional to the wind speed, give reasons for your answer?