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BARSIC [14]
3 years ago
13

Nancy sells handcrafted bracelets at a flea market for $7. If her monthly fixed costs are $775 and each bracelet costs her $2.75

to make, how many bracelets must she sell in a month to make a profit?
Mathematics
1 answer:
sleet_krkn [62]3 years ago
8 0
Each bracelet costs $2.75 She sells them for $7 She makes 7-2.75 = $4.25/bracelet   Let b = # bracelets To make a profit she has to earn more than $775   4.25b > 775 b > 775/4.25 b > 182 6/17
  To make a profit she must sell at least 182 bracelets  
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Which equation is exponential?
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3 years ago
It has been decided that 100 people need to be surveyed to decide the publics opinion on a school building project. A student su
Morgarella [4.7K]

Answer:

The proposed way of sampling is a biased way to perform the survey.

Step-by-step explanation:

Convenience sampling is a kind of non-probability sampling method that comprises of the sample being taken from that portion of the population that is near to hand.  In this type of sampling method, all items doesn’t have an equivalent chance of being selected, which doesn’t comprises of random collection of items.

Convenience sampling is where we take in items which are easy to reach.

Convenience sampling consists of selection bias, i.e.e the bias involved in the sample due to inappropriate selection procedures.

For example, randomly selecting 4 people sitting near him to guesstimate the mean age of the class is a convenience sampling example. or gathering information on customer satisfaction by interviewing 6 randomly selected customers from a local store is an illustration of convenience sampling.

In this case, the sample suggested by the students consists of surveying the first 100 people who enter the school, about the public opinion on a school building project.

This is an example of convenience sample.

So, there is a selection bias present in the sample.

Thus, the proposed way of sampling is a biased way to perform the survey.

4 0
3 years ago
In a batch of 440 water purifiers, 8 were found to be defective. What is the probability that a water purifier chosen at random
LiRa [457]

Answer:

1.8% or 1.818181%

Step-by-step explanation:

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In percentage = 8/440 * 100

=> 8/44 * 10

=> 8/22 * 5

=> 40/22

=> 20 / 11

20/11 is roughly 1.8181818

Rounding it to the nearest tenth, we get 1.8%

If my answer helped, kindly mark me as the brainliest!!

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