40 is 50% of what number?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

How can you construct perpendicular lines and prove theorems about perpendicular lines