3 years ago

Help me pls I will help you

Mathematics

1 answer:

ki77a [65]3 years ago

4 0

Answers

1. 9/2

2. 1/8

3. 5/9

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Please help! Show all work.

Morgarella [4.7K]

First, let's work with the denominator alone:

4⁻⁴ = 1 / 4⁴ = 1/256 .

The original problem is the reciprocal of that = 256.

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4 years ago

A. No; Each side of triangle PQR is not the same length as the corresponding side of triangle STU.

ruslelena [56]

B yes both triangles have an obtuse angle

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3 years ago

A random sample of 15 employees was selected. The average age in the sample was 31 years with a variance of 49 years. Assuming a

vova2212 [387]

Answer:

Assuming ages are normally distributed, the 98% confidence interval for the population average age is [26.3, 35.7].

Step-by-step explanation:

We have to construct a 98% confidence interval for the mean.

The information we have is:

- Sample mean: 31

- Variance: 49

- Sample size: 15

- The age is normally distributed.

We know that the degrees of freedom are

$k=n-1=15-1=14$

Then, the t-value for a 98% CI is t=2.625 (according to the t-table).

The standard deviation can be estimated from the variance as:

$s=\sqrt {s^2}=\sqrt{49}=7$

The margin of error is:

$E=t_{14}*s/\sqrt{n}\\\\E=2.625*7/\sqrt{15}=18.375/3.873=4.7$

Then, the CI can be constructed as:

$M-t*s/\sqrt{n}\leq\mu\leq M+t*s/\sqrt{n}\\\\31-4.7\leq \mu \leq 31+4.7\\\\26.3\leq \mu \leq 35.7$

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3 years ago

CAN SOMEONE PLEASE HELP! FOR BRAINLIEST!!!

julsineya [31]

Answer:

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Step-by-step explanation:

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3 years ago

What is the median number of the following number set?<br><br> 177, 227, 341, 227, 103, 155

Bezzdna [24]

Answer:

Step-by-step explanation:

arrange in ascending order

103,155,177,227,227,341

number of terms=6

median =(3rd+4th)/2=(177+227)/2=404/2=202

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3 years ago