The ratio of boys to girls in the 9th grade is 5 to 6. There are 312 girls. Set up a proportion to model this information.
A. 5/312 = 6/b b. 5/b = 312/6 c. 5/6 = b/312 d. 5/6 = 312/b

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.

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities