Select all expressions equivalent to (3x + 5y)?.
A 9x² + 25y²
B 3x²+2(3x) (5y) + 5y2
C (3x)2 + 2(3x)(5y) + (57)
D (3x)2 + (3x)(5y) + (5y)2
E 9x2 + 30xy + 25y2

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables