Use compatible numbers to estimate 5,320 divided 61 ( I would appreciate if you also helped me with 1,624 divided 23 but no need to!)

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Simplify the expression below -3(10x+4y)+6(6x-2y)