The Sahara Desert covers about 8.3x10^13 sqaure feet.
The average depth of the sand in the Sahara Desert is 200 feet.
A grain of sand has a volume of approx. 1.3 x 10^-9 cubic feet.
Which of the following is the best estimate of the number of grains of sand in the Sahara Desert?
Can anyone let me know how to go about solving this problem? I know these are in scientific notation, but I have no idea how they get to these answers.
Does anyone know the answer?