Ik this is easy but i just want to make sure if i’m right

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

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 +"

Sketch one cycle if the cosine function y=2cos2theta