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
inn [45]
2 years ago
9

12 is 60% of what number?

Mathematics
1 answer:
goldenfox [79]2 years ago
8 0

Answer: 20

<u>Step-by-step explanation:</u>

12 is 60% of what number

12 = 0.60 * n

20 = n  

You might be interested in
PLEASEEEE HELLP ON A TIMER 15 MINS LEFT
emmainna [20.7K]

Answer: D.

Step-by-step explanation: you find the ratio of the other lengths, then apply that ratio to the length of DC. Pls mark as brainliest?

8 0
2 years ago
A healthcare provider monitors the number of CAT scans performed each month in each of its clinics. The most recent year of data
Rasek [7]

Answer: a. 1.981 < μ < 2.18

              b. Yes.

Step-by-step explanation:

A. For this sample, we will use t-distribution because we're estimating the standard deviation, i.e., we are calculating the standard deviation, and the sample is small, n = 12.

First, we calculate mean of the sample:

\overline{x}=\frac{\Sigma x}{n}

\overline{x}=\frac{2.31=2.09+...+1.97+2.02}{12}

\overline{x}= 2.08

Now, we estimate standard deviation:

s=\sqrt{\frac{\Sigma (x-\overline{x})^{2}}{n-1} }

s=\sqrt{\frac{(2.31-2.08)^{2}+...+(2.02-2.08)^{2}}{11} }

s = 0.1564

For t-score, we need to determine degree of freedom and \frac{\alpha}{2}:

df = 12 - 1

df = 11

\alpha = 1 - 0.95

α = 0.05

\frac{\alpha}{2}= 0.025

Then, t-score is

t_{11,0.025} = 2.201

The interval will be

\overline{x} ± t.\frac{s}{\sqrt{n} }

2.08 ± 2.201\frac{0.1564}{\sqrt{12} }

2.08 ± 0.099

The 95% two-sided CI on the mean is 1.981 < μ < 2.18.

B. We are 95% confident that the true population mean for this clinic is between 1.981 and 2.18. Since the mean number performed by all clinics has been 1.95, and this mean is less than the interval, there is evidence that this particular clinic performs more scans than the overall system average.

8 0
3 years ago
Heights of women have a bell-shaped distribution with a mean of 161 cm and a standard deviation of 7 cm. What percent of women f
harkovskaia [24]

Answer:b

:D

Step-by-step explanation:d

504

5 0
2 years ago
PLEASE HELP ME I'LL MARK BRAINLIST
postnew [5]

Answer:

(2,3)

Step-by-step explanation:

3 0
2 years ago
The cost of four cell phones are $345,$400,$110,and$640 What is the Median cost
garri49 [273]

Answer:

372.5

Step-by-step explanation:

Order the numbers least to greatest:

110, 345, 400, 640

Add the two middle numbers:

345+400= 745

Divide 745 by 2:

372.5

6 0
3 years ago
Other questions:
  • Need help finding the percentage
    14·1 answer
  • What is the ratio of the area of abc to the area of triangle qst..?
    9·1 answer
  • Find the sum (3x^2+5x-8)+(5x^2-13x-5)
    11·2 answers
  • 7/12 + 3/4 in simplest form?
    9·2 answers
  • Answer as a fraction<br> 1 / 2<br> 5<br> 6<br> =
    14·1 answer
  • Billy takes two tests in his probability and statistics class. The probability that Billy would pass at least one test is 0.9. T
    15·1 answer
  • How do I find the area ASAP
    6·1 answer
  • Please help! And 20 points! :3
    10·1 answer
  • Express tan J as a fraction in simplest terms.<br> J<br> 34<br> K<br> L<br> 16
    7·1 answer
  • The residents of a city voted on whether to raise property taxes. The ratio of yes to no votes was 7 to 5. If there were 4115 no
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!