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Molodets [167]
2 years ago
12

Jimmy eats seven cookies every three minutes. How long does it take him to eat 28 cookies?

Mathematics
2 answers:
scoray [572]2 years ago
8 0
28 / 7 = 4

3 x 4 = 12


It’ll take him 12 minutes
mario62 [17]2 years ago
7 0

Answer:

12min

Step-by-step explanation:

if7=3

28=?

28×3÷7=12

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At a college, 72% of courses have final exams and 46% of courses require research papers. Suppose that 32% of courses have a res
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Answer:

a) P(F UR) = P(F) +P(R) -P(F and R) = 0.72+0.46-0.32=0.86

b) P(FUR)' = 1-P(FUR)= 1-0.86 = 0.14

Step-by-step explanation:

Let's define the following events first:

F: The event that a course has a final exam.

R: The event that a course requires a research paper

From the info provided we have that:

P(F) = 0.72, P(R) =0.46 P(F and R) =0.32

So then we can create a Venn diagram as we can see on the figure attached.

a. Find the probability that a course has a final exam or a research project.

For this case we can find the probability like this:

P(F UR) = P(F) +P(R) -P(F and R) = 0.72+0.46-0.32=0.86

b. Find the probability that a course has NEITHER of these two requirements.

For this case we can use the complement rule and we can find the probability like this:

P(FUR)' = 1-P(FUR)= 1-0.86 = 0.14

And that's the same value obtained with the diagram.

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Answer:

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Step-by-step explanation:

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