What is the y-intercept of f(x) =(1/2)^x
A.(1,1/2)
B. (0,1)
C. (1,0)
O D. (0,0)

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?