What is a fraction with a decimal value between 1/2 and 3/4

What is the pattern in the values as the exponents increase?

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?