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earnstyle [38]
3 years ago
15

What is the surface area of a sphere with a radius of 11cm? Use 3.14 for pi

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
6 0
I hope this helps you



Area=4.pi.r^2


Area =4.3,14.11^2


Area =1519
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Answer:

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2 years ago
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In a 3M Privacy Filters poll, 806 adults were asked to identify their favorite seat when they fly, and 492 of them chose a windo
Snowcat [4.5K]

Answer:

Step-by-step explanation:

If majority of adults prefer a window seat when they fly, it means that more than half or more than 0.5 of the population prefer a window seat when they fly.

We would set up the hypothesis test.

For the null hypothesis,

p = 0.45

For the alternative hypothesis,

p > 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

Sample proportion, P = x/n

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n = number of samples = 806

P = 492/806 = 0.61

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.61 - 0.5)/√(0.5 × 0.5)/806 = 6.24

From the normal distribution table, the p value < 0.00001

Since alpha, 0.01 < than the p value, then we would reject the null hypothesis. Therefore, at a 1% significance level, we can conclude that the majority of adults prefer a window seat when they fly.

8 0
3 years ago
Please help me with these questions
Mariana [72]

Answer:

A1=59

A2=85

A3=49

A4=no.because strait lines add up to 180 and it does not

B1=x=133andy=133

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B3=x=37andy= 37

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8 0
2 years ago
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h

Step-by-step explanation:

3 0
3 years ago
Subtract and simplify.
Anestetic [448]
(y^2-7y-5)-(-3y^2+3y-4)
=y^2-7y-5+3y^2-3y+4
=3y^2+y^2-7y-3y-5+4
=4y^2-10y-1

In short, the answer would be 4y^2-10y-1 (Option D).

Hope this helps !

Photon
6 0
3 years ago
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