Question

A grain of sand weighs approximately 0.011 grams. There are approximately 7.5 x 10^18 grains of sand in the world. Using scientific notation, calculate approximately how much all the grains of sand in the world weigh (in grams). Show and explain your work, rounding to the nearest hundredth; answer in a complete sentence.

Answer 1

Well the work the other person did was correct ill put in a way you will understand it more...

Answer 2

.011 = 1.1* 10^-2 in scientific notation

1.1*10^-2 * 7.5 * 10^18 = (1.1*7.5) * 10 ^ (-2+18)

8.25*10^16

The sand weighs 8.25 * 16^16 grams.