The last choice is the right answer. Curves do not have a constant rate of change.
Answer: One tail test.
Step-by-step explanation:
Given : A sample of 36 observations is selected from a normal population. The sample mean is 12, and the population standard deviation is 3.
Also, The set of hypothesis to conduct a test :-

The kind of test need to perform is dependent upon the alternative hypothesis.
Since, the alternative hypothesis is one tailed (right-tailed), so the test is one tail test.
the answer is $3.88
Step-by-step explanation:
because the ice cream was $4.00 and they subtracted it by 12% which would be $4.00 minus .12 which would give you $3.88
Answer: Diego buys about 3 pounds of blueberries, b
Step-by-step explanation: Lets write an equation to solve for b, how many pounds of blueberries he bought.
4.99b=14.95
Solve:
4.99b divided by 4.99 = 14.95 divided by 4.99
b = 3