Look at the attached image please answer s fast as possible will give 35 points if answered correctly

A)  D

Step-by-step explanation:

A)

(7 x 3) x (10 (5) x 10 (2)) - brackets are squared numbers to go on the top.

21 x 10 (5 / 2)

= 21 x 10 (7)

= 2.1 x 10 (8)

sorry I’m not sure how to do B

i think it is x = 1.2

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.