Question

Work out (5 x 10^3) (9 x 10^7)
Give your answer in standard form.

Answer 1

(5x10^3)(9x10^7)=4.5x10^11
standard form move decimal to the right 11 times, so 450000000000

Answer 2

(5 x 10^3) (9 x 10^7) = 5 × 9 × 10^3 × 10^7 = 45 × 10^10