What is the mean absolute deviation of the data set? {20, 10, 30, 20, 50, 30, 40, 20} 08 O 10 o 12 O 20​​

Find the quotient. 50a2 – 98b2 -5a +7b

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day