Answer
4 inches to 8 inches
Work Step by Step
Given, after 15 years, a saguaro cactus is still only $\frac{1}{3}$ ft to $\frac{2}{3}$ ft of a foot tall, depending upon rainfall.
To find how tall could the cactus be in inches,
Use a unit fraction with inches (the unit for your answer) in the numerator, and foot (the unit being changed) in the denominator. Because 12 inches (in.) = 1 foot (ft.), the necessary unit fraction is
$\frac{12 inches}{1 foot}$
Multiply $\frac{1}{3}$ ft times the unit fraction.
$\frac{1}{3}$ ft * $\frac{12 inches}{1 foot}$ = 4 inches
Multiply $\frac{2}{3}$ ft times the unit fraction.
$\frac{2}{3}$ ft * $\frac{12 inches}{1 foot}$ = 8 inches
Therefore the cactus is 4 inches to 8 inches tall
