Question

Which shows the expression below simplified?

(8 × 106) × (4 × 10-4)

A. 3.2 × 101
B. 3.2 × 104
C. 3.2 × 103
D. 12 × 102

Answer 1

Using PEMDAS correctly,
(8 × 106) × (4 × 10-4) = (848) × (40 - 4) = 848 × 36 = 30528.

Using left-to-right sintaxis,
(8 × 106) × (4 × 10-4) = (848) × (4 × 6) = 848 × 24 = 20352.

A. 3.2 × 101 = 323.2
B. 3.2 × 104 = 332.8
C. 3.2 × 103 = 329.6
D. 12 × 102 = 1224

None of the answers?
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