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Margaret [11]
3 years ago
15

In order to fairly set flat rates for auto mechanics, a shop foreman needs to estimate the average time it takes to replace a fu

el pump in a car. How large a sample must he select if he wants to be 90% confident that the average time is within 20 minutes of the sample average? Assume the standard deviation of all times is 40 minutes.
Mathematics
1 answer:
Ede4ka [16]3 years ago
4 0

Answer:

ME = 1.96(45)/sqrt(n) 25 = 1.96(45)/sqrt(n) n = (1.96(45)/25)^2 = 6

Step-by-step explanation:

yw

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Y_Kistochka [10]

Answer:

Dobereiner's Triads are groups of three elements arranged in such a way that the atomic weight of the middle element is almost the average of the other two. The elements of triad have almost similar properties

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7 0
3 years ago
If f(x)=2 sin 3x+C, then the maximum value of f(x) is:<br> 1)C<br> 2) C+2<br> 3) C+3<br> 4) C+6
Vladimir79 [104]
<h3>Answer:  C+2</h3>

Reason:

The largest sin(x) can get is 1, and the same goes for sin(3x).

Consequently, the largest 2sin(3x) can get is 2.

You can visually verify these claims by graphing each function with a tool like Desmos. Take note of the y coordinate of the highest points. See below.

Therefore, the largest f(x) = 2sin(3x)+C can get is 2+C or C+2

8 0
2 years ago
Which figure contains an angle bisector?
Anastaziya [24]

Answer: Figure 2.

Step-by-step explanation:

Suppose that we have an angle with measure ∠M, a bisector would be a line that divides this angle in two equal parts, such that each new angle has measures (∠M)/2

Then the correct option will be the one that has two equal angles.

In figure 2, we can see that RP divides the angle SRQ in two angles 52°, then RP is the bisector of the angle.

Then the correct option is figure 2.

6 0
3 years ago
What is 1% of 1. Please help
Sedbober [7]

Answer:

0.01

Step-by-step explanation:

1% of 1 = 0.01

Hope this helps :]

6 0
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Mice21 [21]

Answer:

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Step-by-step explanation:

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3 years ago
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