Suppose planet a's diameter is approximately 2 times planet  b's and both bodies are spheres. what is the ratio of their volumes?

Answer this 30 points and brainliest!

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?