Betty puts 50 bacteria in a petri dish. The population of bacteria is tripling every hour. Which function best represents the situation?
A
f(h) - 50 x 3
B
f(h) - 50 x
С
f(h) - 3 x 40
D
f(h) - 3 x 40

Me. i can't figure out this question. give an explanation too. .

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Ineed ! i can’t figure out this graph