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Reika [66]
3 years ago
15

Can someone help me complete this worksheet please and thank you it’s all multiple choice

Mathematics
1 answer:
7nadin3 [17]3 years ago
7 0

Answer:

1. D 12.8 cm

2. B 4.2 m

3. A 9.59

4. A 6.95

5. B 17.5 cm

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The increase is D: 50% because the 1 in the parentheses stands for the 20 that was already there, with the .5 being the amount that’s actually being increased. 0.5 translates to 50%, so the answer is D.
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What fraction, decimal or percent. Is equivalent to 9/9
8_murik_8 [283]

Answer:

1/1

1.0

100%

Step-by-step explanation:

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mezya [45]

Answer: 1/2 times 6x equals 3x  and then you do 1/2 times 4 and that equals 2 then multiply the 3 and 4 in the parenthesis and that is 12 then add 12 to the 3 and 2 and your answer is 17.

Step-by-step explanation:

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2 years ago
Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed
vlabodo [156]

Answer:

95% two-sided confidence interval on the true mean breaking strength is (94.8cm, 99.2cm)

Step-by-step explanation:

Our sample size is 11.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

df = 11-1 = 10.

Then, we need to subtract one by the confidence level \alpha and divide by 2. So:

\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 10 and 0.025 in the two-sided t-distribution table, we have T = 1.812

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

s = \frac{4}{\sqrt{11}} = 1.2060

Now, we multiply T and s

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For the upper end of the interval, we add the sample mean and M. So the upper end of the interval here is

L = 97 + 2.19 = 99.19 = 99.2cm

So

95% two-sided confidence interval on the true mean breaking strength is (94.8cm, 99.2cm).

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3 years ago
a person on a 2500 calorie diet states that they are healthier because they eat more veggies. explain why this is not accurate?
LiRa [457]

Step-by-step explanation: because they need to have atleast 2500 calories a day

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