Algebra Help (question in description)

Question

Use the Pythagorean Theorem and the square root property to solve the following problem. Express your answer in simplified radical form. Then find a decimal approximation to the nearest tenth.
A rectangular park is 16 miles long and 8 miles wide. How long is a pedestrian route that runs diagonally across the park?
In simplified radical form, the pedestrian route is
nothing miles long.

Answer 1

8^2 + 16^2 = p^2

 

64 + 256 = 320 = p^2

 

√320 = p

 

p = 8√5