Find the product.

(3n - 10p)^2

6n^2 - 30np + 20p^2

9n^2 - 60np + 100p^2

9n^2 - 100p^2

9n^2 - 20p + 100p^2

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

What is best way to getting answer for my exam is

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?