Which property or properties of arithmetic do you use when you calculate 3×70 by first calculating 3×7 = 21 and then putting a zero on the end of 21 to make 210? write equations to show which properties are used and where

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

To decrease an amount by 16% what single multiplier would you use

Traffic on saturday, it took ms. torres 24 minutes to drive 20 miles from her home to her office. during friday's rush hour, it took 75 minutes to drive the same distance. a. what was ms. torres's average speed in miles per hour on saturday? b. what was her average speed in miles per hour on friday?