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V125BC [204]
3 years ago
8

. You answer 95% of the questions correctly on a 20-question test. How many questions do you answer correctly

Mathematics
2 answers:
lions [1.4K]3 years ago
7 0

Answer:You answered 19 questions correctly and 1 question wrong

Step-by-step explanation:First you have to divide 20 by whatever number that can get you to the number 100 by 20,which is 5(100 divided by 5 equals 20)Lastly you have to divide 95 by 5 and you get 19!

Brums [2.3K]3 years ago
6 0

Answer:

19 one question wrong

Step-by-step explanation:

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W + what - s = w <br> help plz help helppp i want help
grandymaker [24]

Answer: S

Step-by-step explanation:

w + ? - s = w

w + s - s = w

w = w

7 0
3 years ago
Find the length of<br> __<br> JK<br> Round answer to nearest tenth.
PIT_PIT [208]

Answer:

Step-by-step explanation:

We would apply the law of Cosines which is expressed as

a² = b² + c² - 2abCosA

Where a,b and c are the length of each side of the triangle and A is the angle corresponding to a. Likening the expression to the given triangle, it becomes

JK² = JL² + KL² - 2(JL × KL)Cos10

JK² = 61² + 53² - 2(61 × 53)Cos10

JK² = 3721 + 2809 - 6466Cos10

JK² = 6530 - 6367.767

JK² = 162.233

Taking square root of both sides of the equation, it becomes

JK = √162.233

JK = 12.73 to the nearest tenth

6 0
2 years ago
Below is the data of ages at the local swimming park on a certain day.
Alex_Xolod [135]
We know that
To determine the intervals you will need to find the lowest and highest numbers
lowest number------> 1
highest number-----> 35
(1 and 35). 

A general rule would be 5-7 intervals,
so
 I will choose 5.
Here are the intervals with the number of people that were in each:

[1-7] -----------> (9)
[8-14] ---------> (14)
[15-21] --------> (8)
[22-28] ------> (3)
[29-35]-------> (5)

The total of the frequencies was 39 people, and that is how many numbers there are.
7 0
2 years ago
What is the domain and the outputs
aliya0001 [1]

<u><em>Domain:</em></u>

input values

independent

<u><em>Outputs:</em></u>

output values

dependent

3 0
3 years ago
he blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 247.3 and a standard deviation of 6
Ulleksa [173]

Answer:

The approximate percentage of women with platelet counts within 3 standard deviations of the​ mean is 99.7%.

Step-by-step explanation:

We are given that the blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 247.3 and a standard deviation of 60.7.

Let X = <em>t</em><u><em>he blood platelet counts of a group of women</em></u>

The z-score probability distribution for the normal distribution is given by;

                                Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = population mean = 247.3

           \sigma = standard deviation = 60.7

Now, according to the empirical rule;

  • 68% of the data values lie within one standard deviation of the mean.
  • 95% of the data values lie within two standard deviations of the mean.
  • 99.7% of the data values lie within three standard deviations of the mean.

Since it is stated that we have to calculate the approximate percentage of women with platelet counts within 3 standard deviations of the​ mean, or between 65.2 and 429.4, i.e;

         z-score for 65.2 =  \frac{X-\mu}{\sigma}

                                     =  \frac{65.2-247.3}{60.7}  = -3

         z-score for 429.4 =  \frac{X-\mu}{\sigma}

                                       =  \frac{429.4-247.3}{60.7}  = 3

So, it means that the approximate percentage of women with platelet counts within 3 standard deviations of the​ mean is 99.7%.

4 0
2 years ago
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