Answer:
rationalizing
Step-by-step explanation:
The area is 24 square inches so it would cost $480
Bu using Pythagoras theorem
(x^2)+(21)^2=(75)^2
Therefore. 5625-441=(x)^2
X^2=5184
Therefore x=72
Third side length=72 units
It would be 23 I’m pretty sure:)
