Find the volume of the squared based pyramid shown. The dimensions are h = 21 feet, a = 22 feet, and b = 7 feet. Round your answer to the nearest tenth.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect