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2 years ago

1. If the increase in time causes a corresponding decrease in the price of a product. Identify the proportionality.

Mathematics

1 answer:

Maksim231197 [3]2 years ago

8 0

Context...

Explation;

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The average monthly cell phone bill was reported to be $50.07 by the U.S. Wireless Industry. Random Sampling of a large cell pho

zalisa [80]

Answer:

The null and alternative hypotheses are:

$H_{0}:\mu= 50.07$

$H_{a}:\mu>50.07$

Under the null hypothesis, the test statistic is:

$t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt{n}} }$

Where:

$\bar{x} = 52.86$ is the sample mean

$s=7.0132$ is the sample standard deviation

$n=10$ is the sample size

$\therefore t=\frac{52.86-50.07}{\frac{7.0132}{\sqrt{10}} }$

$=1.26$

Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:

$t_{critical}=1.833$

Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.

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2 years ago

(a2 − 6) and (a2 + 4) are the factors of

sleet_krkn [62]

(a²-6)(a²-4) simplify

a⁴-4a²-6a²+24

Combine like terms

a⁴-10a²+24

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3 years ago

Is pi rational?? helppppp

Katyanochek1 [597]

Answer:

Yes

Step-by-step explanation:

Pi is a rational number, because it goes on forever.

5 0

2 years ago

QTR is a right triangle TQR is a right triangle QS is an altitude which statements are true

mars1129 [50]

Answer:

A and C

Step-by-step explanation:

for A

QT/RT=ST/QT=QS/QR

There are two QT's in this

(QT)^2 = RT * ST

FOR B

there is no RT twice

for C

QR/RT RS/QR

There is a QR twice

so QR^2=RT*RS

FOR D there is no RT twice

(if you have the other answers for this quiz plz give them to me lol)

4 0

2 years ago

A company took a survey about its new project. I did the hundred people surveyed, 44 liked the new product. What percentage of t

Aleks [24]

Answer:

The percentage people surveyed like to the new product is 44%.

Step-by-step explanation:

Given:

Company took a survey about its new project, hundred people surveyed, 44 liked the new product.

Now, to find the percentage of the people surveyed like to the new product:

People like new product / Total people surveyed × 100

$\frac{44}{100}\times 100$

$=0.44\times 100$

$=44$

So, it is 44%

Therefore, the percentage people surveyed like to the new product is 44%.

3 0

3 years ago