Question

Evaluate (3.1 × 10⁴) • (2 × 10⁶). Choose the correct answer.

A. 5.1 × 10¹⁰
B. 5.1 × 10²⁴
C. 6.2 × 10¹⁰
D. 6.2 × 10²⁴​

Answer 1

Answer: C

Move the decimal in 3.1 over 4 times

Move the decimal in 2.0 over 6 times

Now it is 31,000 times 2,000,000 which equals 62,000,000,000. In scientific notation it is 6.2 times 10 to the tenth power

Answer 2

• C) 6.2 × 10¹⁰

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Evaluate the expression in below steps:

• (3.1 × 10⁴) · (2 × 10⁶) = Group numbers and exponents
• (3.1 × 2) · (10⁴⁺⁶) = Multiply numbers and add up powers of 10
• 6.2 × 10¹⁰ Answer