A grain of sand weighs about 1 x 10 g.
Researchers at the University of Hawaii
estimate there are 7.5 x 108 grains of
sand on all the beaches of Earth. How
much do all of these grains of sand
weigh?
O A. 7.5 x 10 g
OB. 8.5 x 10g
O c. 7.5 X 102 g
O D. 8.5 X 102 g

Step-by-step explanation:

In this problem, we are told that the mass of 1 grain of sand is:

The total mass of N grains of sand will be therefore

where

N is the number of grains of sand

M is the total mass

Here we have a number of grains of sand equal to

Therefore, the total mass of the grains of sand is:

what's that

addition

step-by-step explanation: