Answer
a) 12 bushels per tree
b) $4680
Work Step by Step
Find the total number trees.
$3\ rows\times\frac{5\ trees}{row}=15\ trees$
a) Create a proportion using ratios of bu : tree.
$\frac{180\ bu}{15\ trees}=\frac{x\ bu}{1\ tree}$
Set the product of the means equal to the product of the extremes and solve for the variable.
$15\times x = 180\times1$
$15x=180$
$15x\div15=180\div15$
$x=12$
b) Create a proportion using ratios of cost : bu.
$\frac{\$13}{0.5\ bu}=\frac{\$x}{180\ bu}$
Set the product of the means equal to the product of the extremes and solve for the variable.
$0.5\times x = 13\times180$
$0.5x=2340$
$0.5x\div0.5=2340\div0.5$
$x=4680$
