We have to convert the height, that is in feet and inches, to inches alone.
We know that 1 ft is 12 inches, so we can write:
[tex]7ft+7in=7ft\cdot\frac{12in}{1ft}+7in=7\cdot12in+7in=(84+7)\text{ in}=91\text{ in}[/tex]Answer: the tree height is 91 inches.
