A glider begins its flight $\frac{3}{4}$ mile above the ground. After 45 minutes, it is $\frac{3}{10}$
mile above the ground. Find the change in height of the glider. If it continues to descend at this rate, how long does the entire descent last?

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?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

What is always true about a positive integer raised to a negative odd power?