The exact value of cos 5pi/12 is:

A) 0.99
B) 0.26
C) sqrt2(sqrt3-1)/4
D) sqrt2(sqrt3+1)/4

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16