2 years ago

Please help!

Mathematics

1 answer:

34kurt2 years ago

3 0

Answer:

11,695 ft²

Step-by-step explanation:

Since the pizza is circular

Area of a circle = π r²

where r is the radius

but radius is the diameter divided by 2

$r \: = \: \frac{122}{2} \\ r \: = \: 61ft$
$area \: = \: \pi \: \: {r}^{2} \\ area \: \: = \: \frac{22}{7} \times {61}^{2} \\ area \: = \: 11695 \: {ft}^{2}$

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g Suppose you wish to perform a hypothesis test for a population mean. Suppose that the population standard deviation is known,

NikAS [45]

Answer:

z-test.

Step-by-step explanation:

We want to perform an hypothesis test for a population mean.

In the case that the <u>standard deviation of the population is known</u> and the population distribution is normal, even if the sample is small, <u>we will use a z-test</u>.

The usual case is to not know the standard deviation of the population, in which case a t-test is adequate instead of a z-test, taking into account the degrees of freedom of the sample.

5 0

3 years ago

Leah is building a slide for her kids. if the latter is 7 feet tall and she wants the bottom of the slide to be 4 feet from the

nadezda [96]

The line needs to be 8.06 m long

Explanation

Given that the ladder is 7 feet tall and the bottom of the slide should be 4 m away from the ladder.

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base=4m

height=7m

hypotenuse can be determined using pythagoras law

$b^{2} +h^{2} =H^{2} \\x^{2} 4^{2}+ 7^{2}= H^{2} \\16+49=H^{2} \\H=\sqrt{65} \\=8.06 m$