There are 7.5e38 stars in our galaxy. so far astronomers have mapped 0.27% of all of these stars.

1) how many stars have been mapped in our sky?

write answer like this example "5.23e45". round to three significant digits, "5.23"

  2.03E36

Step-by-step explanation:

The number mapped is the product of the total number and the fraction that are mapped:

  7.5E38 × .27E-2 = 7.5×.27 E (38 -2) = 2.025E36 ≈ 2.03E36

step-by-step explanation:

mean or average is 40.6

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft