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enot [183]
2 years ago
15

A consumer wanted to find out how accurate Siri (an Apple digital assistant) is, so he asked questions on general facts and reco

rded how many Siri got right. Out of the 84 questions he asked Siri, Siri responded correctly to 73 of them. What is the estimate of the population proportion
Mathematics
1 answer:
Mashcka [7]2 years ago
6 0

Answer:

The answer is "0.869"

Step-by-step explanation:

Number of sample (n) = 84

Number of correct response (X) = 73

Calculating the Sample proportion:

Formula:

\text{Sample proportion}=\frac{\text{number of sample}}{\text{correct responses}}

                              =\frac{n}{X}\\\\= \frac{73}{84} \\\\=0.869

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Fred says that 1/2 and 7/8 are equivalent fractions. Draw area models for 1/2 and 7/8 to show if Fred's statement is correct. Na
jok3333 [9.3K]

Answer:

For your area models you would draw two rectangles and divide one into 2 equal sections, and the other one with 8 equal sections. You then shade 1 box out of the first triangle with 2 equal sides. Then you would shade 7 boxes on the rectangle with 8 equal sides. These diagrams would show you that 7/8 and 1/2 are not equivalent.

To find out what fractions are equivalent to 1/2 you would take 1/2 and times the numerator and denominator by the same number.

1/2*2/2= 2/4

2/4=1/2

1/2*9/9= 9/18

9/18=1/2

2/4 and 9/18 both equal 1/2

Hope this helps ;)

4 0
3 years ago
How many real roots and how many complex roots exist for the polynomial
Volgvan

Answer:

D. 4 real roots and 0 complex roots

Step-by-step explanation:

If I assume that the function you are saying is

F(x)=x^4+x^3-5x^2+x-6

There should be up to "4 roots," there can't be more or less than 4 total solutions. First, we need to check how many sign changes are there in this function. There are 3 positive real roots. Now lets check for negative roots.

F(-x)=x^4-x^3-5x^2-x-6

There are is only 1 negative real root. Since we basically have 4 real roots, and the max is 4. There should be 4 real roots and 0 complex roots.

8 0
3 years ago
The number of students at parkville high school is 21 less than 2 times the number of students at midtown middel school which ex
o-na [289]

c.

The number of students is represented with S, to show 2 times that number it is shown as 2S, a less than is word problem jargon for minus. So it is 2S-21.

4 0
3 years ago
(5x+2)/8=x/6 what value will make it true??
Naya [18.7K]
X should equal -6/11 if I read the equation right
8 0
3 years ago
Read 2 more answers
What is this equation of this line?
lisov135 [29]
The equation of the line is y=2/3x + 0

Explanation: The y intercept (where the line crosses the y axis) is 0, and the slope is 2/3 (up two and 3 to the right)
7 0
3 years ago
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