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barxatty [35]
3 years ago
15

Becky surveyed the 32 shoppers who spent the most time and money at her boutique last month. Will this result in a representativ

e sample?
Mathematics
1 answer:
stepladder [879]3 years ago
7 0
I imagine that not everyone that visited Becky’s Store spent a lot of time and money there. If she surveys only those that did, this is not a representative sample because she is leaving out other customers. She would have no one in her sample that represents customers who spent a lot of time but no money, or little time and no money or even little time and a lot of money. These are just some examples but clearly her sample is biased.
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The scale on a map is 1 in: 55 miles. What is the distance on the map between two cities that are 99 miles apart?
Alex_Xolod [135]

Answer:

1.8 inches

Step-by-step explanation:

Create a proportion where x is the distance on the map

\frac{1}{55} = \frac{x}{99\\}

Cross multiply and solve for x

55x = 99

x = 1.8

So, the distance on the map is 1.8 inches

4 0
3 years ago
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Arianna went to the store to buy some chicken. The prince per pound of the chicken is $5.75 per pound and she has a coupon for $
gregori [183]

Answer:

$20

Step-by-step explanation:

If you buy 4 pounds of chicken, you multiply 5.75 times 4. That gives you $23. You have a coupon for $3 off the final amount. $23-$3 = $20.

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3 years ago
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8c=5c+21 What would that be
NemiM [27]
To solve for C, you have to get both of the numbers with a C on the same side.  So, subtract the 5c from the right side onto the left side.

8c = 5c + 21\\8c - 5c = 5c - 5c + 21\\3c = 21

Then, divide by 3 on each side.

3c = 21\\3c /3 = 21/3\\c = 7

So, c = 7.
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3 years ago
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How can you use a number line to find the sum of -4 and positive 6
MrRissso [65]
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3 0
3 years ago
The probability that a plane departs on time at a certain airport is .87 The probability that a plane arrives on time given it d
sleet_krkn [62]

Answer:

0.9355

Step-by-step explanation:

What we will use here is conditional probability formula.

let A be the event that the plane departs on time

and B be the event that it arrives on time

P(A) = 0.87

P(B|A) = 0.93

P(B) = ?

P(A n B) = ?

Mathematically;

P(B|A) = P(B nA)/P(A)

0.93 = 0.87/P(A)

P(A) = 0.87/0.93

P(A) = 0.935483870967742

which is 0.9355 to four decimal places

7 0
3 years ago
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