Which represents the smallest number a.3.8 x 10^7 b.3.8 c.3.8*10^-18 d.3.8*10^15

Arranging these numbers in a vertical column makes it easier to rank them by size:

A.3.8 x 10^7

B.3.8

C.3.8*10^-18

D.3.8*10^15

That factor 10^15 in D is by far the largest power of 10 in this list. The correct answer is D.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

the answer is c

step-by-step explanation: i took a test with this question on it