Question

Which answer correct estimates the product of 3.09 × 304.87? A. about 9.0 B. about 9.9 C. about 90 D. about 900

Answer 1

D.)about 900. reason being  it equals 942.0483, rounding to 942.

Answer 2

The answer is D. about 900. 3.09 x 304.87 =942.0483. so rounded 
by the tens you would get about 900