Are decimals 0.4 and 0.40 equal explain

Match each expression with its simplified form.

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12