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Oduvanchick [21]
3 years ago
14

What are the values of r and a1

Mathematics
2 answers:
Aloiza [94]3 years ago
6 0

Answer:

a1 = .45 and r = 8

Step-by-step explanation:

This is of the form

sum a1 r^ k-1

a1 = .45 and r = 8

Aleonysh [2.5K]3 years ago
4 0
The first one I think
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The weather forecast for the weekend is a 34% chance of rain for Saturday and a 32% chance of rain for Sunday. If we assume that
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Answer:

P( A \cap B) = P(A) *P(B) = 0.34*0.32 = 0.1088

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And rounded we got P(A \cup B ) = 0.551

That represent the probability that it rains over the weekend (either Saturday or Sunday)

Step-by-step explanation:

We can define the following notaton for the events:

A = It rains over the Saturday

B = It rains over the Sunday

We have the probabilities for these two events given:

P(A) = 0.34 , P(B) = 0.32

And we are interested on the probability  that it rains over the weekend (either Saturday or Sunday), so we want to find this probability:

P(A \cup B)

And for this case we can use the total probability rule given by:

P(A \cup B) = P(A) + P(B) - P(A \cap B)

And since we are assuming the events independent we can find the probability of intersection like this:

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P(A \cup B) = 0.34+0.32 - 0.1088 = 0.5512

And rounded we got P(A \cup B ) = 0.551

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