Help Please.. Question in the file.

Forty-five percent of what number is 22.5? A. 10.125 B. 100 C. 50 D. 30

Mnenie [13.5K]

Look at the answers and be logical, try rounding up so instead of 45% try 50% now 22.5 would be half the number, have a look at the answers and see what is closest to double 22.5. C looks reasonable. Hope I helped, have a nice day :)

5 0

3 years ago

Read 2 more answers

Vanessa ate 1/3 of a pizza for dinner. Her brother Van ate 1/2 of the leftover pizza. How much of the pizza did Van eat?

Zinaida [17]

Uh for the second question, his height in decimal form would be 4.75, kind sir.

Hope this helped,

5 0

3 years ago

A group of 54 college students from a certain liberal arts college were randomly sampled and asked about the number of alcoholic

aliya0001 [1]

Answer:

P-value = 0.4846

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 4.73

Sample mean, $\bar{x}$ = 4.35

Sample size, n = 51

Alpha, α = 0.05

Sample standard deviation, s = 3.88

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 4.73\\H_A: \mu \neq 4.73$

We use Two-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{4.35 - 4.73}{\frac{3.88}{\sqrt{51}} } = -0.699$

Now, $z_{critical} \text{ at 0.05 level of significance } = \pm 1.96$

We can calculate the p-value with the help of standard normal table.

P-value = 0.4846

Since the p-value is higher than the significance level, we fail to reject the null hypothesis and accept it.

We conclude that this college has same drinking habit as the college students in general.

7 0

4 years ago

Use substitution to solve the system of equation x=y+6 x+y=10

DiKsa [7]

X = 8
Y = 2 Your welcomeeeeee

6 0

3 years ago

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The ___ of a parabola is the line, along with a point not on the line, which is used to generate a parabola.

enot [183]

Answer:

Directrix

Step-by-step explanation:

The directrix of a parabola is the line, along with a point not on the line (which is the focus), which is used to generate a parabola. The directrix is parallel either to the x- or y-axis, and is perpedicular to the parabola's axis of symmetry (at x = h).

Therefore, the correct answer is "directrix."

3 0

3 years ago