A 63,000 times
B 1*10^1 times
C 1.1 times
D 1*10^-1

B

Step-by-step explanation:

The mass of an adult North Pacific right whale is about 70,000 kg, or 7 * 10^4 kg. The mass of a male African elephant is about 7000 kg, or about 7 * 10^3 kg. About how many times more massive is the right whale than the African elephant?

We are given that the whale's weight is 7 * 10^4, and the elephant's weight is 7 * 10^3.

Set how much bigger the whale is than the elephant as x. So,

7 * 10^4 = 7 * 10^3 *x

If we divide the first number (7) by 7, we get that

1 * 10^4 = 1 * 10^3 * x

Divide both sides by 10^3

1 * 10^1 = x

Thus, the whale is 1 * 10^1 times bigger than the elephant. The answer is B.

I hope this helps! Feel free to ask any questions!

my answer is$ 12

step-by-step explanation:

because 15 -2=12

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation: