Abag contains 3 marbles, 3 rocks, and 3 pencil erasers. hilde will take one item from the bag without looking. what is the probability that she will not choose a rock?
a) 1/9
b) 1/3
c) 2/3
d) 8/9

(me and a friend are arguing over this, she thinks it's b, i think it's c. ? )

What situation is an example of an observational study

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?