What is the missing digit?

37 + 22 = __

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

How many grams the dog will eat in 3 days?