Question

8 of 10
21:42
Which of the following equations are true? (choose 2)
A (6.7 × 10-3) × (4 × 102) = 26.8 × 10-1
B (7 × 103)(4 × 102) = (28 × 106)
C (3.8 × 103)(4.4 × 106) = 1.672 × 1010
D
1.1 × 108 = 1.375 × 1015
8.0 × 107
E
9.11 × 105 = 3.6 × 1011
8.75 × 10-6

Answer 1

Answers: A and C.

Work:
A: (6.7 × 10^-3)(4 × 10^2) = 6.7·4 × 10^(-3+2) = 26.8 × 10^-1 — true.

C: (3.8 × 10^3)(4.4 × 10^6) = 3.8·4.4 × 10^9 = 16.72 × 10^9 = 1.672 × 10^10 — true.

B, D, E are not equal as written.