Given the regression below, please answer a and b? Degrees of freedom = 30

a. Find the covariance between 1 and 2?

b. Do we reject the null hypothesis at 5% significance level? Please show your work.

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Which of the following parabolas opens down?

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent