During a scientific experiment the temperature of a container decreased by $35.7\degree$ C at a constant rate over $8\frac{1}{2}$ hours.

What value represents the change in the temperature of the container each hour?

A $-8.9\degree$ C

B $-4.4\degree$ C

C $-4.2\degree$ C

D $4.2\degree$ C
CORRECT ANSWERS ONLY PLEASE WILL GIVE BRAINLIST

Aline passes through the two given points. is it vertical , horizontal , or neither ? (5, 2), (-5, -2)

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.