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kari74 [83]
3 years ago
15

A manager of a department store is interested in determining the percentage of people attracted to his store by magazine adverti

sing. Doing an extensive survey, he finds that the average number of people in his store on any given day who have seen the advertising is 200, while the standard deviation of this group is 40. Assuming that the number of people in the store who have seen the advertising has a normal distribution.
(a) Determine the probability that between 155 and 220 people will see the advertisement.
(b) Determine the probability that less than 230 people will see the advertisement.
(c) Determine the probability that less than 130 people will see the advertisement.
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
6 0
The answer is determine the problem theat
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The table shows the change in the water level (in centimeters) of a reservoir for three months.
dem82 [27]

Answer:

- 1 5/24 cm

Step-by-step explanation:

We'll have to get the fractions to a common denominator. the least common denominator for 3 and 80 is 240.

So - 1 1/3 = - 1 80/240 = 320/240

21/80 = 63/240

-11/80 = -33/240

-------------------------------------

-320/240 + 63/240 - 33/240 = -290/240 = - 1 50/240 = -1 5/24 cm

7 0
2 years ago
Kayla and her children went into a restaurant and she bought $63 worth of hotdogs and tacos. Each hotdog costs $3.50 and each ta
laiz [17]

Answer:

x= hotdogs

y=tacos

Step-by-step explanation:

(3.50)x+ 3x + 4y= 63

7 0
2 years ago
11cm by 6 cm rectangle
puteri [66]

Answer:

Question unclear.

If the question was about the perimeter of the rectangle, it is calculated as:

= (Length * 2) + (Height * 2)

= (11 * 2) + (6 * 2)

= 22 + 12

= 34 cm

If the question was bout Area, the area is:

= Length * width

= 11 * 6

= 66 cm²

8 0
3 years ago
Which expression represents the expression 20 x − 10 20 ⁢ x - 10 after it has been factored completely? A. 2 ( 10 x − 5 ) 2 ⁢ (
son4ous [18]

Answer:

A. 2 ( 10 x − 5 )

D. 10 ( 2 x − 1 )

Step-by-step explanation:

Given expression:

20x − 10

Find the equivalent expression

Check all that applies

A. 2 ( 10 x − 5 )

= 20x - 10

B. 2 ( 2 x − 1 )

= 4x - 2

C. 10 ( 20 x − 10 )

= 200x - 100

D. 10 ( 2 x − 1 )

20x - 10

The correct options are

A. 2 ( 10 x − 5 )

D. 10 ( 2 x − 1 )

7 0
2 years ago
Solve for the variable shown. Round answers to the nearest hundredth if needed.
Olenka [21]

Answer and Step-by-step explanation:

Question 4:

We need to solve for y, so we need to use the cosine trig function, which is adjacent divided by hypotenuse.

cos(21) = \frac{y}{18}\\\\18(cos(21)) = y = 16.8\\\\\\

Question 5:

We need to use the sine trig function, which is opposite divided by hypotenuse.

sin(43) = \frac{31}{x} \\\\x = \frac{31}{sin(43)} = 45.45

#teamtrees #WAP (Water And Plant)

4 0
3 years ago
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