Algebra Problem:

Question

Estimate (using scientific notation and rounding each entry to two digits) and round off answer to two digits: (0.000014 x 10^-12)(849,018 x 10⁴)

(A) 1.2x10^-9

(B) 1.2x10^-12

(C) 1.2x10^-2

(D) 1.2x10^-8

(E) none of the above

For this I got (A) 1.2x10^-9

Is this correct?

Answer 1

(1.4 x 10^-7)(8.5 x 10^-1) ≈ 12 x 10^-8 = 1.2 x 10^-9

Good job!

Answer 2

(14*10^-18)(849,018 x 10⁴)=11.88*10^-8 or #A.