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2 years ago

5

This year Jack will be 2 years from being twice as old as your sister Jen. The sum of Jack's age and three times Jen's age is 66

. How old is jen?

1 answer:

FinnZ [79.3K]2 years ago

3 0

The age of jenn is 13.6 years old.

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Ab-2=3c solve for b

katrin2010 [14]

I think b would be 3c+2 over a

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Kayson is looking at two buildings, building A and building B, at an angle of elevation of 73' Building A is 30 feet away, and b

wlad13 [49]

Answer:

Building B, it is around 16 35 feet taller than building A ( C )

Step-by-step explanation:

<u>Calculating the height of Building A </u>

Height = opposite ( ? )

∅ = 73°

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∴ Height = Tan 73° * base

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<u>Calculating the height of building B </u>

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1 year ago

Bonus: Give the nth term for the sequence below:

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Next item is determined by recognizing how the previous items are

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2 years ago

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Suppose that out of 20% of all packages from Amazon are delivered by UPS. 15% of the packages that are delivered by UPS weighs 2

Gelneren [198K]

Answer:

0.1938 = 19.38% probability that a package is delivered by UPS if it weighs 2 lbs or more

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: It weighs 2 lbs or more

Event B: Delivered by UPS

15% of the packages that are delivered by UPS weighs 2 lbs or more.

This means that $P(A \cap B) = 0.15$

More than 2 lbs:

15% of 20%(UPS)

93% of 80%(Not delivered by UPS). So

$P(A) = 0.15*0.2 + 0.93*0.8 = 0.774$

a. What is the probability that a package is delivered by UPS if it weighs 2 lbs or more

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.15}{0.774} = 0.1938$

0.1938 = 19.38% probability that a package is delivered by UPS if it weighs 2 lbs or more

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2 years ago