LylaFlorenceid LylaFlorenceid Mathematics Answered For each calculation choose the correct answer written in standard form. a) (7 * 10°) ~ (3 x 10?) A B 21 x 100 21 x 10 С 2.1 x 10" D 2.1 x 10 b) (2 x 10°) = (4 x 102) A 2 x 10 B 5 x 10 с 0.5 x 10 D 2 x 10