Answer:
or 7.14
Step-by-step explanation:
Using the Pythagoras theorem, we can conclude the formula that we are going to use here is 
As we can see, this is a right triangle given that it has the square in the corner there. With this information, we can conclude that the longest side is 10, making it the hypotenuse or 
Now we need to find
in the formula of
making the equation
or
Given the provided information, this would be
or
Simplifying it would be
= 
The radical form would be 
While it's integer would be 7.14
Hope this helps!
Answer:
Step-by-step explanation:

100%-47%(discount) so she is paying 53% of original price now,
100%. $13.99
53%. $X
X=13.99•53/100
X=741.47/100
X=7.4147
She was charged $7.41
The height of the door in the actual playhouse would be 4.5 ft