8ft by 4ft.
This is because there are 8/4 and 4/4 to make up the blueprint. Therefor you have to multiply the factor by 8 and 4.
brainly.com/question/5027087Let C, S and H be the diameters of cell, sand and hair
Diameter of a cell:

Diameter of a grain of sand:

Part A:

meters, because it takes 5 movements right of the decimal dot, until there is only one digit to its left.
Part B:
we are comparing

to

,

thus S is 20 times larger than C
Part C

thus,

Part D.

thus 300 nm are written in meters as follows:
Https://youtu.be/5C9LBF3b65s this should help you understand it
It is 70% Because:
250/100 + 175/x
Proportions