Acivil engineer is analyzing the compressive strength of concrete. compressive strength is approximately normally distributed with variance σ 2 = 1000 psi2 . a random sample of 12 specimens has a mean compressive strength of ¯x = 3255.42 psi. (a) test the hypothesis that mean compressive strength is 3500 psi. use a fixed-level test with α = 0.01.

What is the simplified expression for 6(2(y+x))

Select the correct answer. in the figure, angle k measures 45°. what is the measurement of angle c? a. 38° b. 45° c. 90° d. 98°

Zroms according to the synthetic division below, which of the following statements are true? check all that apply. 352 -2 6 -12 12 2 4 0 i a. (x-3) is a factor of 2x2 - 2x - 12. b. the number 3 is a root of f(x) = 2x2 - 2x - 12. c. (2x2 - 2x - 12) = (x + 3) = (2x + 4) d. (2x2 - 2x-12) - (x-3) = (2x + 4) e. (x+3) is a factor of 2x2 - 2x - 12. o f. the number -3 is a root of fx) = 2x2 - 2x - 12. previous