Which graph represents a phase shift of pi/2 units right for the graph of y = cosx?
A. y = sinx
B. y = secx
C. y = csex
D. y = cos(x+pi/2)

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

Need me know if option a,b,c are wrong so ik its d

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?