To determine </span><span> how much Eileen will spend on gasoline, first we need to calculate how many gallons she needs. If she drives 850 miles and </span><span>her car gets 23 miles per gallon, we can use the proportion: 850 miles : x gallons = 23 miles : 1 gallon Crossing the products: x = 850 miles </span>× 1 gallon ÷ 23 miles x = 36.96 gallons
Thus, Eileen needs 36.96 gallons of gas. If the cost per gallon of gas is$2.79, using the proportion: 36.96 gallons : x = 1 gallon : <span>$2.79 x = 36.96 gallons </span>× $2.79 <span>÷ 1 gallon x = </span>$103.12 x ≈ $<span>103</span>
