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ratelena [41]
3 years ago
15

The rule is y=− 3/4 x+ 1 /4

Mathematics
1 answer:
Effectus [21]3 years ago
7 0
The answer is C because y=-3/4 which is a negative.
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217.72 million in scientific notation
zepelin [54]

2.17720 × 10^2 is the answer

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3 years ago
The oblique pyramid has a square base.
Brums [2.3K]

Good evening ,

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Answer:

the volume of the pyramid = 5cm³

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Step-by-step explanation:

the volume of the pyramid = (b×h)/3 = (2²×3,75)/3 = (4×3,75)/3 = 15/3 = 5.

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3 years ago
Rewrite 1/5 as a percent​
il63 [147K]

Answer:

20%

Step-by-step explanation:

1/5 as a percent is 20%

The 1 in 1/5 is equal to 10.

The 5 in 1/5 is equal to 50.

Therefore you would multiply 50 x 2 to get 100.

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3 years ago
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4 0
2 years ago
50 random teenagers were asked how many hours a day they use their phone. They spent an average of 7 hours a day with a standard
tatyana61 [14]

Answer:

The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.

Step-by-step explanation:

We have the standard deviation of the saple, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2\frac{1.3}{\sqrt{50}} = 0.4

In which s is the standard deviation of the sample and n is the size of the sample.

The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.

4 0
2 years ago
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