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FinnZ [79.3K]
3 years ago
15

Karen is knitting quilts for her family and friends as holiday gifts. As she knits the quilts she becomes more proficient each w

eek. If the pattern continues, during what week will Karen knit 18 quilts
Mathematics
2 answers:
Scorpion4ik [409]3 years ago
8 0
At what rate does she become more proficient? You didn't mention the pattern 
Anika [276]3 years ago
4 0

Karen is knitting quilts for her family and friends as holiday gifts. As she knits the quilts she becomes more proficient each week. If the pattern continues, during what week will Karen knit 18 quilts?

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A vacuum cleaner costs £85
Vitek1552 [10]

Answer: £76.50

Step-by-step explanation:

You find 10% of 85 = 8.5

then you do £85-£8.50 = 76.50

7 0
3 years ago
The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.4 parts per million (ppm). A consumer h
Elodia [21]

Answer:

Null hypothesis : \mu \leq 0.4

Alternative hypothesis: \mu >0.4

And for this case a type of error I for this case would be reject the null hypothesis that the population mean is lower or equal than 0.4 when actually is true.

A Type I error would occur if, in fact, μ ≤ 0.4 ppm, but the results of the sampling lead to the conclusion that μ > 0.4 ppm

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".  

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".  

Type I error, also known as a “false positive” is the error of rejecting a null  hypothesis when it is actually true. Can be interpreted as the error of no reject an  alternative hypothesis when the results can be  attributed not to the reality.  

Type II error, also known as a "false negative" is the error of not rejecting a null  hypothesis when the alternative hypothesis is the true. Can be interpreted as the error of failing to accept an alternative hypothesis when we don't have enough statistical power

Solution to the problem

For this case we are trying to check the following hypothesis:

Null hypothesis : \mu \leq 0.4

Alternative hypothesis: \mu >0.4

And for this case a type of error I for this case would be reject the null hypothesis that the population mean is lower or equal than 0.4 when actually is true.

A Type I error would occur if, in fact, μ ≤ 0.4 ppm, but the results of the sampling lead to the conclusion that μ > 0.4 ppm

7 0
3 years ago
HELP ME PLZZ I AM GIVING 40 POINTS
harina [27]

Answer:

D. 4/25

Step-by-step explanation:

If you add up all the number of times they picked up a balloon (50 times because 22 + 7 + 8 + 13 = 50) and how many times the orange balloon was chosen (8) then you will get 8/50 and 8/50 simplified is 4/25.

3 0
3 years ago
Find the zeros of the quadratic function f(x) = 1/2(x- 7)^2 – 8​
Rasek [7]

Answer:

x = 11 or 3

Step-by-step explanation:

f(x) = (1/2)(x- 7)² – 8​

to find the zeros, we equate f(x) = 0

f(x) = 0

(1/2)(x- 7)² – 8​ = 0      (add 8 to both sides)

(1/2)(x- 7)² = 8     (multiply both sides by 2)

(x- 7)² = (8)(2)

(x- 7)² = 16

x-7 = ±√16

x-7 = ±4

hence,

x - 7 = 4

x = 4 + 7

x = 11

or

x - 7 = -4

x = -4 +7

x = 3

5 0
3 years ago
9y + 9 - 3y + 7 = 2y + 4<br><br> y = Answer
DENIUS [597]

Answer:

y = -3

Step-by-step explanation:

9y + 9 - 3y + 7 = 2y + 4

Collect like terms;

6y + 16 = 2y + 4

Subtract 2y from both sides;

4y + 16 = 4

Subtract 16 from both sides;

4y = -12

Divide both sides by 4;

y = -3

7 0
3 years ago
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