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guapka [62]
3 years ago
15

Pls help, 'll mark the brainliest. SOS

Mathematics
1 answer:
miv72 [106K]3 years ago
5 0

Answer:

Which one do you need the answer for

Step-by-step explanation:

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Evaluate the expression 3. 14(a2 ab) when a = 4 and b = 2. (Input decimals only, such as 12. 71, as the answer. ) Answer for Bla
nikklg [1K]

Answer:

1792

Step-by-step explanation:

14(a^2 ab)

a=4      b=2

=14(4^2*4*2)

=14(16*8)

=14*128

1792

4 0
2 years ago
One plane leaves an hour after another plane. The first plane travels at 400mph. How fast must the second plane travel to catch
Dovator [93]

Answer:

200 mph

Step-by-step explanation:

Ⓗⓘ ⓣⓗⓔⓡⓔ

Plane a: 400mph

Plane b: x mph

2x=400

x=200

(っ◔◡◔)っ ♥ Hope this helped! Have a great day! :) ♥

BTW, brainliest would be greatly appreciated, I only need one more before I advance, thanks!

Also, I may have done something wrong, please tell me if it's incorrect!

4 0
3 years ago
Read 2 more answers
A dietitian wants to know the average time spent on breakfast in a primary school. The dietitian randomly samples 25 students an
blsea [12.9K]

Answer:

The right options are:

a. The margin of error is 0.632

f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.

<em />

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>Select one or more:</em>

<em>a. The margin of error is 0.632</em>

<em>b. The margin of error is 1264.</em>

<em>C. The margin of error is 0.600.</em>

<em>d. We believe that the true mean time spent on breakfast is between 11.968 and 13.232 minutes.</em>

<em>e. If we take many other samples from this population, 95% of them will have a sample mean that is between 11968 and 13232.</em>

<em>f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.</em>

The margin of error can be calculated from the bounds of the confidence interval as:

E=\dfrac{UL-LL}{2}=\dfrac{13.232-11.968}{2}=\dfrac{1.264}{2}=0.632

As the confidence interval is calculated at 95% confidence, we are 95% confident that the true mean is within the calculated interval. We are not 100% confident although (that's why Option d is false).

This interval does not give us information about the sampling distribution (option e is false).

8 0
3 years ago
The total surface area of a cube is 294cm squared. <br> Work out the volume of the shape.
Maslowich

Answer:

V=343

Step-by-step explanation:

4 0
4 years ago
If set M =[even digits from 2 to 8]. Find n(M)​
laila [671]

Answer:

n(M) = 4

Step-by-step explanation:

M = (2,4,6,8)

n(M) = Number of values in set M.

n(M) = 4

8 0
3 years ago
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