Line r is parallel to line c.

what angle is congruent to ∠3

a. ∠2
b. ∠4
c. ∠5
d. ∠6

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.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.