The volume of one of the Great Lakes is 3.5 × 103 cubic kilometers. If there are 6.3 × 107 fish in the lake, what is the average number of fish per cubic kilometer?

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.