A teacher initially plans to take an SRS of size 50 from his large high school and calculate the sample mean of student GPAs. Later, the teacher decides to increase the sample size so that the standard deviation of the sampling distribution of will be half as big as when using a sample size of 50. What sample size should the teacher use? 57 100 150 200 354

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)