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3 years ago

10

You have a batting average of .250. This means that the probability of your getting a hit is 25%. If you have 520 attempts this

season, how many hits can you expect to get?

2 answers:

Ksju [112]3 years ago

6 0

Answer:

130 expected hits

Step-by-step explanation:

520 attempts times 0.25 is 130

Strike441 [17]3 years ago

3 0

Answer:

130 hits answer right I know because I got it right ...

Hopes it helps

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Please HELP Will CROWN BRAINLIEST!!!!!!!!!!!!! 20PTS

Sladkaya [172]

2, sin( θ )=6/12=1/2 => theta=30 degrees.
=> triangle is 30-60-90

3.
Cos(45)=sqrt(2)/2
=> x=10*sqrt(2)/2=5sqrt(2)

4 0

3 years ago

Write an equation in slope-intercept form for the line.<br><br> slope = 0, y-intercept = 3

Anit [1.1K]

Answer: y = 0x+3 or y = 3

The slope is 0 and the y intercept is 3. So m = 0 and b = 3.

Plug those into y = mx+b to get y = 0x+3, and that simplifies to y = 3.

This graphs out a horizontal line that passes through the two points (0,3) and (1,3).

8 0

3 years ago

According to the Oxnard College Student Success Committee report in the previous year, we believe that 18% of students struggle

gladu [14]

Answer:

A sample size of 392 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

18% of students struggle in their classes because they don't spend more than 8 hours studying independently outside of a 4-unit class.

This means that $\pi = 0.18$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

You would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?

A sample size of n is required.

n is found when M = 0.05. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.05 = 2.575\sqrt{\frac{0.18*0.82}{n}}$

$0.05\sqrt{n} = 2.575\sqrt{0.18*0.82}$

$\sqrt{n} = \frac{2.575\sqrt{0.18*0.82}}{0.05}$

$(\sqrt{n})^2 = (\frac{2.575\sqrt{0.18*0.82}}{0.05})^2$

$n = 391.5$

Rounding up:

A sample size of 392 is required.

8 0

3 years ago

For a certain population, the regression equation to predict salary (in dollars) from education (in years) is y=2530x + 5200. Wh

timofeeve [1]

Answer:

2530 has no units

Step-by-step explanation:

In order to understand the units from a linear equation we need to understand the general equation of a line which is:

y=mx+b where:

m=slope of the line

b=y-intercept.

Comparing the given equation with the general line equation, we noticed that 2530 represents the slope of the line.

Since the slope can be obtained by:

m=(y2-y1)/(x2-x1) whatever the units are, the slope is dimensionless, which means that 2530 has no units.

3 0

3 years ago

Please help quickly!

Hunter-Best [27]

You can set up a ratio of side lengths as follows:
$\frac{63}{x} = \frac{42}{50}$

Now we just solve for x (by cross-multiplying):
$63*50 = 42x$
$x = \frac{63*50}{42} = 75$

So, x = 75 units.

4 0

3 years ago