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OLga [1]
3 years ago
15

Need help on 12 and 11!! Hurry!!

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
5 0

11. 5/6

12.146/158=73/79

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A van has room for 6 students and 2 teachers . How many vans are needed for a total of 48 students and 16 teachers ?
LekaFEV [45]
48 ÷ 6 = 8

16 ÷ 2 = 8

So you need 8 vans

I hope that helps!
5 0
3 years ago
Read 2 more answers
A small business owner estimates his mean daily profit as $970 with a standard deviation of $129. His shop is open 102 days a ye
Katena32 [7]

Answer:

The probability that the shopkeeper's annual profit will not exceed $100,000 is 0.2090.

Step-by-step explanation:

According to the Central Limit Theorem if we have a population with mean <em>μ</em> and standard deviation <em>σ</em> and we select appropriately huge random samples (<em>n</em> ≥ 30) from the population with replacement, then the distribution of the sum of values of <em>X</em>, i.e ∑<em>X</em>, will be approximately normally distributed.  

Then, the mean of the distribution of the sum of values of X is given by,  

 \mu_{x}=n\mu

And the standard deviation of the distribution of the sum of values of X is given by,  

 \sigma_{x}=\sqrt{n}\sigma

The information provided is:

<em>μ</em> = $970

<em>σ</em> = $129

<em>n</em> = 102

Since the sample size is quite large, i.e. <em>n</em> = 102 > 30, the Central Limit Theorem can be used to approximate the distribution of the shopkeeper's annual profit.

Then,

\sum X\sim N(\mu_{x}=98940,\ \sigma_{x}=1302.84)

Compute the probability that the shopkeeper's annual profit will not exceed $100,000 as follows:

P (\sum X \leq  100,000) =P(\frac{\sum X-\mu_{x}}{\sigma_{x}}

                              =P(Z

*Use a <em>z</em>-table for the probability.

Thus, the probability that the shopkeeper's annual profit will not exceed $100,000 is 0.2090.

6 0
2 years ago
Plz help................
Paul [167]
The answer is a^{2} +2a
3 0
3 years ago
Read 2 more answers
A rectangle has a length of 12 and a width that is half the length. What is the area?
Basile [38]

Answer:

Area = length x width

width = 1/2 length = 12/2 = 6 = width

area = 6x 12 = 72

Hope that answers your question

don't hesitate to comment if you are confused about something

Step-by-step explanation:

3 0
2 years ago
FIND V, W, X, Y <br><br><br> PLEASEEEE
RoseWind [281]

Answer:

see explanation

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180° , thus

w = 180° - (90 + 31) °= 180° - 121° = 59°

y = 59° ( vertical angle to w )

w and v are adjacent angles, thus

w + v = 180°

59° + v = 180° ( subtract 59° from both sides )

v = 121°

x = 121° ( vertical angle to v )

Thus

v = 121°, w = 59°, x = 121°, y = 59°

5 0
3 years ago
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