So before we can find the perimeter, we need to find the hypotenuse. Since this is a right triangle, we can use the pythagorean theorem. The equation for that is 
, in which a and b are the legs of the triangle and c is the hypotenuse.
With this info, we can form our equation: 
Firstly, solve the exponents: 
Next, combine everything on the left side: 
Next, square root both sides, and your hypotenuse will be 15 = c.
Now that we have all the triangle side lengths, just add everything up: 
In short, the perimeter is 36 inches.
Complete Question
A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with
. A random sample of 12 sample specimens has a mean compressive strength of 
. Round your answers to 1 decimal place. (a) Calculate the 95% two-sided confidence interval on the true mean compressive strength of concrete.
Answer:
Step-by-step explanation:
From the question we are told that:
Sample size 
Standard deviation 
Sample mean 
Confidence level =95%
significance level
From table \alpha 0.05
Gives
Generally the equation for confidence interval is mathematically given by
x^2 - 8 ) x^4 +- 36 ( x^2 + 8
x4 - 8x^2
8x^2 + 36
8 x^2 - 64
Subtract 36 - - 64 = 100 Answer
4/5>1/2 4/5 is bigger because 1/2 is only half and 4/5 is more than half
H=9.3
h+2.9=12.2
2.9-2.9=0
12.2-2.9=9.3
I hope that helped
