The mean weight of a class of sixth graders is 103 pounds with a standard deviation of
6.3 pounds. If a student's weight is in the
lowest 2.5% of the class, what would be his
or her approximate weight?
A. 115.6
B. 108.4
C. 96.7
D. 90.4

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.