Question

An environmental scientist estimated the number of drops of water in two different jugs. He estimated that the smaller jug contains 809,000,000 drops of water and the larger jug contains 5,770,000,000 drops of water. What is the difference between the number of drops of water in the larger jug and the number of drops of water in the smaller jug?

A) 6.579 × 109 drops of water
B) 4.961 × 109 drops of water
C) 4.668 × 109 drops of water
D) 2.32 × 108 drops of water

Answer 1

Answer: B

Explanation:

5,770,000,000 = 5.770 x 10⁹

809,000,000 = 0.809 x 10⁹

5.770 x 10⁹

- 0.809 x 10⁹

4.961 x 10⁹

NOTE: 10⁹ is the "like" term so add (or subtract) the coefficients to find the sum (or difference).

Answer 2

577000000-809000000=4961000000 =4.961*10^9

Choice B