Wyatt can buy T-shirts in packs of 5 for $8.15 or in packs of 2 for $5.86. How much money does he save by buying 20 T-shirts at the better price?

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?

If line segment ab measures approximately 8.6 units and is considered the base of parallelogram abcd, what is the apprlroximate corresponding height of the parallelogram?

Kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a.m. which sample is the most random?