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Marianna [84]
3 years ago
8

How to solve this problem?

Mathematics
1 answer:
arsen [322]3 years ago
7 0
The exact answer is 336
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Previous studies on sleep tendencies report that, on average, an adult American will sleep for 6 hours each night with a standar
Rasek [7]

Answer:

b) One sample z-test for means

Step-by-step explanation:

Normal Distribution

we have μ₀ (population mean from previous studies)

sample size    n  =  100

standar deviation of population   σ  = 0.75

And it was determined from sample, that μ = 5 : so we want to know if, at some significance level that value (which is smaller than population mean ) could help in relation to decide about rejecting hypothesis  H₀

We should use a z one tail-test for means (left tail)

4 0
3 years ago
Helppp please!!!!!!!!!!!!!
GrogVix [38]

Answer:

423.9

Step-by-step explanation:

Area 1 = 3.14 (16²) = 803.84

Area 2 = 3.14 (11²) = 379.94

803.84 - 379.94 = 423.9

4 0
3 years ago
Read 2 more answers
Consider the figure below. I need need help with what’s the slope of TR is:
Keith_Richards [23]

Answer:

The slope of RT is: m = 1

Step-by-step explanation:

Given

  • R(-3, 1)
  • T(2, 6)

Determining the slope between (-3, 1) and (2, 6)

\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(-3,\:1\right),\:\left(x_2,\:y_2\right)=\left(2,\:6\right)

m=\frac{6-1}{2-\left(-3\right)}

Refine

m=1

Therefore, the slope of RT is: m = 1

5 0
3 years ago
How do you do fraction
MakcuM [25]

Answer:

Step-by-step explanation:

7 0
3 years ago
Please this is my last point I really need help <br> Show workings
Lisa [10]

Answer:

x = 14.375

Step-by-step explanation:

Ok, so we know that a triangle has a total interior degree of 180°. And since we already have a 95° angle, we just need to subtract 95 from 180.

180° - 95° = 85°

Now, we already have indicators that two of the three sides are equal. And we already got the angle of the side that does not have a matching partner. So we just need to divide what we already have by 2.

85° / 2 = 42.5°

Now that we know each side is 42.5 degrees, we just need to grab our given equation and put and equal sign at the end with what we already know is the answer (since we are trying to solve for <em>x</em>).

(4x - 15) = 42.5

Now, let's just get rid of those useless parentheses.

4x - 15 = 42.5

Next, we just need to have the variable on its own side, all by itself. So, in order to do that, we just add 15 to both sides.

4x = 57.5

Now, for our final step, we just need to divide each side by our variables' factor (which is a positive 4). In which we get our final answer of:

x = 14.375

4 0
3 years ago
Read 2 more answers
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