Question

The equatorial radius of Mars is 3,394 km. Which of the following would be a reasonable estimate for the equatorial radius of Mars?
A. 3 × 104 km
B. 3 × 10-4 km
C. 3 × 10-3 km
D. 3 × 103 km

Answer 1

@shinalcantara

Answer 2

Subtract 4 from 7. Then, multiply by c.

Which of the following expressions matches the statement above?
4 - 7 × c

(4 - 7) × c

7 - 4 × c

(7 - 4) × c

Answer 3

can u help me @nincompoop

Answer 4

Subtract 4 from 7. Then, multiply by c.

Which of the following expressions matches the statement above?
4 - 7 × c

(4 - 7) × c

7 - 4 × c

(7 - 4) × c

Answer 5

count how many times the decimal point was moved
if it were moved to the left, then it is a positive exponent, if it were moved to the right, then it is a negative exponent

\[
\sf \huge 3212 = 3.2 \times 10^3
\]