Amy is doing a science experiment on how a certain bacterium reacts to an antibiotic. She has 3 dishes of identical bacterium
samples with 17 bacteria in each dish. She gives an antibiotic to all of the bacteria in one dish. All of the treated bacteria died, and
the bacteria in the other two dishes survived
Identify the sample in the situation above
A.
the antibiotic
B. all the bacteria in the treated dish
C.
all bacteria everywhere
D.
all the bacteria in all 3 dishes

20

step-by-step explanation:

yes. we do proportions in probabilities.

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the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).