Question

MUST BE CORRECT ANSWER HELP ASAP

Estimate the following product using scientific notation: (19)(2,120,400).


A. 4 x 10^6

B. 4 x 10^7

C. 2 x 10^7

D. 2 x 10^5

Answer 1

40287600 = B. 4 x
`10^(7)`

Explanation:

We first have to do the multiplication of the numbers given:

19 * 2,120,400

=> 40287600

Now we have to figure out how many digits are after the number 4:

4, 0 2 8 7 6 0 0

7 digits

Meaning that we need an exponent of 7 for it to be in scientific notation, giving us with the answer B. 4 x
`10^(7)`