Problema Solution
The Sahara is a desert of about 3.5 million square miles. There are about 2.79 x 10 to the seventh power square feet in a square mile. About how many square feet does the Sahara cover? Write your answer in scientific notation.
Answer provided by our tutors
3.5 million square miles = 3.5*10^6 square miles
1 square mile = 2.79 * 10^7 square feet
3.5*10^6 square miles = 3.5*(10^6)*2.79*(10^7) square feet = 9.765*10^(6 + 7) = 9.765*10^13 square feet
Sahara covers about 9.765*10^13 square feet.