North america burned 4.5 x 1016 btu of petroleum in 1998. at this rate, how many btu's will be burned in 9 year?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Af jewelry box is in the shape of a rectangular prism with an area of 528 cube inches. the length of the box is 12 inches and the height is 5 1/2 inches. what is the width of the jewelry box