In a science lab, substance X has a mass of 6.10 x 10-7 grams. The mass of substance Y is twice as much as that of substance X. What is the mass, in grams, of substance Y?

A. 1.22 x 10^-5
B. 1.22 x 10^-6
C. 1.22 x 10^-7
D.1.22 x 10^-8

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

Need on this geometry question. explain how you did it.

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1