1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
solmaris [256]
2 years ago
14

Please help it is due in an hour

Mathematics
1 answer:
Soloha48 [4]2 years ago
8 0

I now answer but u was a day late sorry

Step-by-step explanation:

You might be interested in
Write the ratio 41 to 100 as a percent
tia_tia [17]

Answer:

41\%

Step-by-step explanation:

we have the ratio

\frac{41}{100}

To write as percent, multiply the ratio by 100

so

\frac{41}{100}*100=41*100/100=41\%

3 0
3 years ago
Explain how knowing that 5/8 = 0.625 helps you write the decimal for 4 5/8
tatyana61 [14]
When writing a decimal, the numbers to the left of the decimal are whole numbers greater then or equal to 1. The numbers to the right of the decimal are numbers less then 1.

if u know 5/8 = 0.625, then 4 5/8 = 4.625
4 0
3 years ago
The owner of Matt’s Gas Station wants to study gasoline purchases of customers at his station. In 2017, the mean amount of gas
gulaghasi [49]

Answer:

Step-by-step explanation:

a) We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 9

For the alternative hypothesis,

µ ≠ 9

This is a 2 tailed test

Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

µ = 9

x = 9.9

σ = 2.5

n = 50

z = (9.9 - 9)/(2.5/√50) = 2.55

Looking at the normal distribution table, the probability corresponding to the area above the z score is 1 - 0.99461 = 0.00539

Recall, population mean is 9

The difference between sample sample mean and population mean is 9.9 - 9 = 0.9

Since the curve is symmetrical and it is a two tailed test, the x value for the left tail is 9 - 0.9 = 8.1

the x value for the right tail is 9 + 0.9 = 9.9

These means are higher and lower than the null mean. Thus, they are evidence in favour of the alternative hypothesis. We will look at the area in both tails. Since it is showing in one tail only, we would double the area. We already got the area above the z score as z = 0.00539

We would double this area to include the area in the left tail of z = - 2.55. Thus

p = 0.00539 × 2 = 0.01078

Since alpha, 0.01 < 0.01078, we would reject the null hypothesis

But we are told to use the critical value approach, then

Since α = 0.01, the critical value is determined from the normal distribution table.

For the left, α/2 = 0.01/2 = 0.005

The z score for an area to the left of 0.005 is - 2.575

For the right, α/2 = 1 - 0.005 = 0.995

The z score for an area to the right of 0.995 is 2.575

In order to reject the null hypothesis, the test statistic must be smaller than - 2.575 or greater than 2.575

Since - 2.55 > - 2.575 and 2.55 < 2.575, we would reject the null hypothesis. This corresponds to our previous decision.

b) we would assume normal distribution because the sample size is sufficiently large and the population standard deviation is known.

c) Confidence interval is written in the form,

(Sample mean ± margin of error)

Since the sample size is large and the population standard deviation is known, we would use the following formula and determine the z score from the normal distribution table.

Margin of error = z × σ/√n

The z score for confidence level of 99% is 2.58

Margin of error = 2.58 × 2.5/√50 = 0.91

Confidence interval = 9.9 ± 0.91

The lower end of the confidence interval is

9.9 - 0.91 = 8.99

Therefore, p = 9 will be contained in the interval.

4 0
2 years ago
48 x 56 in area model​
Alex787 [66]

Answer:

2688

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Write an equation of a line thru (3,-1) and (-1,-7)
Marrrta [24]

-1 - (-7) over 3 - (-1) = M

-1 + 7 over 3 + 1 = M

6 over 4 = M

6/4 = M

3/2 = M

6 0
3 years ago
Read 2 more answers
Other questions:
  • Mrs. Hwang is taking her vehicle to the shop to have the gas tank expanded by 10 gallons. Now, it costs her $42.56 to fill the t
    7·2 answers
  • A grocery bag can withstand 300 n of force before it rips apart. how many kilograms of apples can it safely hold?
    8·1 answer
  • Let event A = You buy a new umbrella on Friday. Which event is most likely to
    14·3 answers
  • Find the radical equivalent of 27^2/3
    6·2 answers
  • Jim's cat, c, weighs 7 pounds. His dog weighs six times plus 3 pounds. more than his cat. Which equation represent the dogs weig
    7·1 answer
  • I need to find X<br> x^2 = 28
    14·1 answer
  • Is -3 a solution to the equation 3x-5=4+2x
    9·2 answers
  • Help me pleaseeeeeeeeeeeee
    7·1 answer
  • B<br> C<br> height<br> A<br> Choose 1 answer:<br> A<br> B
    5·1 answer
  • Help quick Please!...........................................
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!