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bezimeni [28]
3 years ago
8

A news report says that 28%of high school students pack their lunch. Your high school has 600 students. How many students in you

r high school would you expect to pack their lunch?
Mathematics
2 answers:
sasho [114]3 years ago
7 0

600 * 28% = 168

So, 168 students should be expected.


Vesnalui [34]3 years ago
5 0
Roughly 168

multiply 0.28 by 600 
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uppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5
Marizza181 [45]

Answer:

P(x \le 3.24) = 0.97725

Step-by-step explanation:

Given

\bar x = 2.5

\sigma = 0.37

Required

Percentage that is not more than 3.24

The above implies that:

x = 3.24

Calculate z score

z = \frac{x - \bar x}{\sigma}

z = \frac{3.24 - 2.5}{0.37}

z = \frac{0.74}{0.37}

z = 2

So, the probability is represented s:

P(x \le 3.24) = P(z \le 2)

From z probability

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weeeeeb [17]
The answer is c. Have a great day kids❤️❤️
3 0
3 years ago
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Anarel [89]

Answer:

12

Step-by-step explanation:

18 - 4^2 + 5 x 2

18 - 16 + 5 x 2

18 - 16 + 10

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Hope this helps!

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7 0
3 years ago
Two trains travel at right angles to each other after leaving the same train station at the same time. Two hours later they are
hjlf

Answer:1547.9 miles per hour

Step-by-step explanation:

Let the two trains leave in x direction and y direction

Velocity of train in x direction be v

therefore velocity of train in Y direction is v+29

because one train is 29 miles per hour slower than other.

Distance travel by train in x direction is(x) v(2)

Distance travel by train in y direction is(y) 2(v+29)

distance between them after 2 hours is 4420 miles

Now using pythagoras theorem

x^2+y^2=\left ( 4420\right )^2

\left ( 2v\right )^2+\left ( 2\left ( v+29\right )\right )^2=\left ( 4420\right )

on solving

2v^2+58v-4881699=0

v=\frac{-58\pm \sqrt{\left ( 58 \right )^2+4\cdot 2\cdot4881699}}{2\cdot 2}

v=1547.889 miles per hour

7 0
3 years ago
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