The grand canyon is approximately 2^9 kilometers long. mariner valley is a canyon on mars that is approximately 2^12 kilometers long. about how many times longer is mariner valley than the grand canyon?

(urgent ) use pi 3.14 to estimate the circumference of the circle to the nearest hundredth middle is 4in (urgent )

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.