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3 years ago

I NEED HELP PLEASE, THANKS! :)

Mathematics

1 answer:

Phantasy [73]3 years ago

6 0

Answer:

Step-by-step explanation:

Step1 : Verify Sn is valid for n = 1

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Can someone help me with this? thank you!

hammer [34]

Answer:

240cm³

Step-by-step explanation:

To find our answer we will multiply the volume, width, and height.

4 · 20 · 3 = 240. Therefore, 240cm³ is our answer.

Have a good day!

3 0

2 years ago

Read 2 more answers

A plastic box is 15.3 centimeters long 9.0 centimeters wide and 4.5 centimeters high what is its volume. includes units and your

k0ka [10]

15.3*9*4.5=619.65 cubic cm or $cm^3$

7 0

3 years ago

Read 2 more answers

What is the unknown fraction?

daser333 [38]

Answer:

A. 31/100

Step-by-step explanation:

Change 3/10 to hundreds:

3/10 × 10/10 = 30/100

The denominator (the bottom number) must be 100.

61 - 30 is 31.

The missing number is 31/100. See image.

4 0

2 years ago

Can anyone help me with this please

Elenna [48]

I think that you multiply 2 with 4 to get 8 and then multiply 8 with 7 to get that number then add 2.75... to get the total.

Hope it helped..

3 0

3 years ago

Read 2 more answers

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

4 0

3 years ago