Somone please help for 12 points!!! i mark brainliest please i need this done!!

Mathematics

1 answer:

lions [1.4K]4 years ago

6 0

First we must calculate how much Kelly will pay for the original purchase of $96.60. With 15% off, she will only need to pay $82.11.

Next we must figure out how much gum Kelly will buy to make $96.60 go over $100, and it turns out that 5 packs of gum will be the fewest to make her qualify for the 20% discount.

Buying 5 packs brings Kelly's total up to $100.55 and with a 20% discount she will end up paying $80.44 instead.

Subtract the higher amount ($82.11) by the lower amount ($80.44) aka [$82.11 - $80.44] and we are left with a difference of $1.67

By buying the 5 packs of gum Kelly will save $1.67

Answer: $1.67

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3 years ago

A telephone solicitor is responsible for canvassing three suburbs. In the past, 60% of the completed calls to Belle Meade have r

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There is a 46.25% probability that she receives a donation.

Step-by-step explanation:

We have to divide these probabilities in 2.

First the probability that each suburb donates.

There is a 60% probability that a person from Belle Meade donates

There is a 55% probability that a person from Oak Hill donates.

There is a 35% probability that a person from Antioch donates.

Now the probability that she calls each suburb.

The probablem states that her list of telephone numbers includes one thousand households from Belle Meade, one thousand from Oak Hill, and two thousand from Antioch. In all, she has 4000 total telephone numbers.

She has 1000 numbers from Belle Maede. So there is a 1000/4000 = 25% probability that she calls a person from Belle Maede.

She has 1000 numbers from Oak Hill. So there is a 1000/4000 = 25% probability that she calls a person from Oak Hill.

She has 2000 numbers from Antioch. So there is a 2000/4000 = 50% probability that she calls a person from Antioch.

What is the probability that she gets a donation?

$P = P_{1} + P_{2} + P_{3}$