Ascientist uses 2.8*10^12 cells in one experiment, which is 2,000 times the number of cells she uses in a second experiment. write the number of cells the scientist used in her second experiment in scientific notation. explain your answer.

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.