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Sveta_85 [38]
3 years ago
8

Find the percentage based upon 400 people in the survey. 16%

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0
To find a percentage, you the decimal point in the percent two places to the right 16% = 0.16. Then multiply.

0.16 • 400 = 64

16% of 400 = 64 
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madam [21]

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5 0
3 years ago
A square scarf has a side length of 3/4 yard on each side.
denis-greek [22]

Answer:

\frac{9}{16}\ yd.^2

Step-by-step explanation:

Area of a square: a^2 = a*a

A = a^2\\\\A = \frac{3}{4}* \frac{3}{4}\\\\A =  \frac{9}{16}

Therefore, the answer of the scarf is \frac{9}{16}\ yd.^2

Hope this helps!

8 0
2 years ago
A school will offer pizza on Friday's if at least 30% of the students will buy it. A sample of 50 students asked if they would b
Whitepunk [10]

Answer:

0.0614

Step-by-step explanation:

Solution:-

- The school offers pizza on friday when at-least 30% students are willing to buy.

- The minimum required proportion of students, p = 30%

- A sample of n = 50 students were taken and out of the sample x = 10 people responded willing to buy pizza.

- We will denote a random variable X: the number of students willing to buy Pizza on fridays.

- For the sample of n = 50, for Pizza to be offered on friday the expected number of student who should opt for buying must be at-least:

           Expected ( Mean - u ) = n*p = 50*0.3 = 15 people.

- The standard deviation for the normal distribution can be determined as follows:

          standard deviation ( s ) = √n*p*(1-p)

                                                 = √50*0.3*(0.7)

                                                 = √10.5 = 3.2404

- We will assume that the random variable X follows normal distribution:

                       X ~ Norm ( 15 , 3.2404^2 )

- To determine the probability of sample of size n = 50 with proportion or lower. The number of people willing to buy pizza on friday as per survey are x = 10.

- Evaluate the standard normal ( Z-score ):

                      P ( X < x ) = P ( Z < ( x - u ) / s )

                      P ( X < 10 ) = P ( Z < ( 10 - 15 ) / 3.2404 )

                      P ( X < 10 ) = P ( Z < -1.54301 )

- Use the standard normal tables to determine the value of P ( Z < -1.54301 ):

                     P ( X < 10 ) = P ( Z < -1.54301 ) = 0.0614

Answer: The probability of getting a sample with the proportion or lower given a population with a proportion of .30 is 0.0614.

5 0
3 years ago
A basketball coach has a bag containing 2 red, 5 orange, and 3 brown basketballs. The coach takes 2 basketballs from the bag for
Ronch [10]

Answer:

30%

Step-by-step explanation:

You add the total number of balls, which is 10. and then it is asking for brown balls and looking at the equation you know there are 3. so 3/10 is .30 which is 30%

5 0
3 years ago
Read 2 more answers
If 2x - 3y = 24 and 3x + 4y = 2, what is the value of x - y?
ruslelena [56]

Answer:

10

Step-by-step explanation:

<u><em>y = -4 </em></u>

<u><em>x = 6 </em></u>

<em><u>x-y = 6-(-4) = 6+4 = 10</u></em>

<em><u /></em>

8 0
3 years ago
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