What is it ?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

What is the simplified form of square root of 400 to the 100th power ?