3 years ago

Jennifer's movies are 70% comedies, she has 28 comedy movies. How many movies does she have in total?

Mathematics

1 answer:

Bond [772]3 years ago

4 0

The answer is 40 movies

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stat: sample of 780 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 99% conf

Anettt [7]

Answer: 554

Step-by-step explanation:

If prior population proportion is known, then the formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

As per given description, we have

p= 0.1

E=0.025

Critical z-value for 95% confidence : $z_{\alpha/2}=1.96$

Then,

$n=0.1(1-0.1)(\dfrac{1.96}{0.025})^2=553.1904\approx554$

Hence, the minimum sample size required = 554.

7 0

4 years ago

Identify the equation of a line in slope-intercept form that is perpendicular to y = -1/3 x + 2 and passes through (2, 1)

Airida [17]

Answer:

Step-by-step explanation:

The slope of a line perpendicular to another line is the opposite reciprocal of the slope of the other line, meaning if the slope of the other line is $-\frac{1}{3}$ , then the slope of the line perpendicular is $3$ .

Knowing this, we can start to construct the equation for the line:

$y = mx + b$

$y = 3x + b$

To solve for $b$ , we plug in the coordinates of the point that we know the line runs through, $(2, 1)$ :

$y = 3x + b$

$1 = 3(2) + b$

$1 = 6 + b$

$b = -5$

Therefore, the slope of the line that is perpendicular ot the line provided in the equation is the following:

$y = 3x - 5$

5 0

4 years ago

Need help pls question 3 pls pls pls

MaRussiya [10]

Answer:

maybe 67 ft not sure though

4 0

3 years ago

Determine the volume of the composite figure

madreJ [45]

1.8903
because if you do the math its easy

3 0

3 years ago

Please help me on this one

Semenov [28]

Answer:

Step-by-step explanation:

5+10+10+10+10+10=55

Please give hearts for how good the answer was

5 0

4 years ago

Read 2 more answers