Triangle ABC is a right triangle whose right angle is LABC. Find the measure of ZEBF.

LABC and DBF are vertical angles, so they have the same
measure. Because m ABC is 90°, the sum of m2DBE and
mZEBF must also be 90° .
Solve for x in this equation.
X + (x - 12) = 90
2x - 12 = 90
2x = 102
x=51

mZ EBF - 51

What is M?
Explain how to find M

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95

If 0° ≤ θ ≤ 90° and cosθ = 11 15 , what is the value of sin (90° - θ)? a) 11 /15 b) 15/ 11 c) 15 /4 d) 4/15