Which could be the measures of the three angles of an acute triangle?

a.
30°, 30°, 120°

b.
30°, 60°, 90°

c.
50°, 55°, 75°

d.
40°, 40°, 100°

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Sketch one cycle if the cosine function y=2cos2theta