COMMUNICATION la) For what values of n is (-1)" a positive number? Explain or justify your answer.
b) For what values of n is -1" a positive number? Explain or justify your answer.

What is the measure of x, in degrees

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?