The national mean sat score in math is 550. suppose a high school principal claims that the mean sat score in math at his school is better than the national mean score. a random sample of 72 students finds a mean score of 574. assume that the population standard deviation is latex: \sigma=100 σ = 100 . is the principal's claim valid? use a level of significance of latex: \sigma=0.05 σ = 0.05 .

4 puzzles in 3 hours

step-by-step explanation:

c

-by-step explanation:

it would be c

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm

the answer to this would be 5x^3-6x^2-24 over 3x^2

hope this if needed hmu