Plz explain your answer! i will mark at !

A. 16.12 ft  B.  9.64 ft

Step-by-step explanation:

For both of these, you need Pythagorean's Theorem because we have right triangles.  In part A, we are given 2 legs and are asked to find the length of the hypotenuse:

and

and PR = 16.12 ft

In part B, we are given the length of the hypotenuse and side PQ remains the same:

and

so

QR = 9.64 ft