What is the correct listed sample space of total outcomes for rolling a die and flipping a coin?

A 1H, 2T, 3H, 4T, 5H, 6T
B 1H, 2H, 3H, 4H, 5, 6H
C 1H, 1T, 2H, 2T, 3H, 3T, 4H, 4T, 5H, 5T, 6H, 6T
D 1T, 2T, 3T, 4T, 5T, 6T

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Bring the fraction a/a-4 to a denominator of 16-a^2