INTRODUCTORY EXERCISES - Modeling Real World Problems
(1) Find two numbers whose sum is 55 and whose product is 684.
(2) A farmer has 2400 ft of fencing and wants to fence off a rectangular field that borders a straight river. He needs no fence along the river. Express the area of the field as a function of the length of the side parallel to the river.
(3) If the area of a circle is 144
square units, find its circumference.
(4) The length of a rectangular garden is 7 units greater than its width. If its perimeter is 210 units, what are the dimensions of the garden?
(5) A cash box contains $525 in $5 and $10 bills. The total number of bills is 74. How many bills of each denomination are there?
