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2 years ago

Solve: 17.2 = 8.9 + c c =

Mathematics

1 answer:

vaieri [72.5K]2 years ago

4 0

Answer:

The square root of 8.3, and -8.3

Step-by-step explanation:

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A survey of 100 similar-sized hospitals revealed a mean daily census in the pediatrics service of 27 with a standard deviation o

Vinil7 [7]

Answer:

We conclude that the mean is greater than 25.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25

Sample mean, $\bar{x}$ = 27

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 6.5

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25\\H_A: \mu> 25$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{27 - 25}{\frac{6.5}{\sqrt{100}} } = 3.07$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.645$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Thus, the mean is greater than 25.

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3 years ago

Last week, Rohana bought a new computer for 10% off the advertised price. The advertised price was $1,800. How much did Rohana h

oee [108]

10% of 1800 is 180. If she payed 180 ten times it would be 1800 dollars. The computer is 180 dollars off. 1800-180= 1620. She pays $1620

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2 years ago

The number forty one to the power of negative start fraction two over five end fraction end power can be written in the form sta

Fantom [35]

From the description we can infer that we have the expression: $41^{- \frac{2}{5} }$ .
Now, to write our expression as a as a root, we are going to apply the law of exponents: $x^{-n}= \frac{1}{x^n}$ first
$41^{- \frac{2}{5} }= \frac{1}{41^{ \frac{2}{5} }}$

Next, we are going to apply the law about fractional exponents: $x^{ \frac{m}{n}}= \sqrt[n]{x^m}$
$\frac{1}{41^{ \frac{2}{5} }}= \frac{1}{ \sqrt[5]{41^2} }$

We can conclude that the value of B is 2.

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3 years ago

(−12 3/4) ÷ (−5 1/2) in a fraction

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51/22 hope this helps BRAINLIEST??

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3 years ago

Determine the area of the following circle

sleet_krkn [62]

Answer:

31.6 sq.in i got by using 2pier formula

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3 years ago

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