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Advocard [28]
3 years ago
13

A clothing store owner tracks the amount of money the last 10 customers spend in her store. The owner concludes that the typical

amount spent by any customer is $28.80. The owner's conclusion
A) is valid. The last 10 customers only bought sale items.
B) is correct. This is the average amount spent by any customer.
C) is invalid. This is not a good representation of all customers.
D) is unfair. The last ten people in the store may have been tired.
Mathematics
2 answers:
hodyreva [135]3 years ago
0 0
I believe it would be c 
tatuchka [14]3 years ago
0 0
<span>C) is invalid. This is not a good representation of all customers.</span>
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Show that (A | B) U (B \ A) = (AUB) \(B n A).
trasher [3.6K]

Answer:

We have to prove,

(A \ B) ∪ ( B \ A ) = (A U B) \ (B ∩ A).

Suppose,

x ∈ (A \ B) ∪ ( B \ A ), where x is an arbitrary,

⇒ x ∈ A \ B or x ∈ B \ A

⇒ x ∈ A and x ∉ B or x ∈ B and x ∉ A

⇒  x ∈ A or x ∈ B and x ∉ B and x ∉ A

⇒ x ∈ A ∪ B and x ∉ B ∩ A

⇒ x ∈ ( A ∪ B ) \ ( B ∩ A )

Conversely,

Suppose,

y ∈ ( A ∪ B ) \ ( B ∩ A ), where, y is an arbitrary.

⇒ y ∈ A ∪ B and x ∉ B ∩ A

⇒ y ∈ A or y ∈ B and y ∉ B or y ∉ A

⇒  y ∈ A and y ∉ B or y ∈ B and y ∉ A

⇒  y ∈ A \ B  or  y ∈ B \ A

⇒  y ∈ ( A \ B ) ∪ ( B \ A )

Hence, proved......

7 0
2 years ago
A bicycle has a listed price of $658.99 before tax. If the sales tax rate is 7.25%, find the total cost of the bicycle with sale
cestrela7 [59]

Answer:

$706.77 total cost of bicycle

Step-by-step explanation:

$658.99 x .0725 = $47.776   (Move decimal twicw to left to change to decimal)

$658.99 + $47.776 = $706.766 = $706.77

8 0
2 years ago
Please help me with these two!?
mixer [17]

Answer:

11. Yes this is reasonable. Because medicine is often taken in small amounts, 4 millilitres is reasonable

12. This is not reasonable. Three liters of water is a very large amount. If you drink three liters of water in one sitting you could get water poisoning.

Step-by-step explanation:

6 0
3 years ago
What is the weight, in kg, shown by the arrow on the scale below?
dedylja [7]

Answer:

1400 g because these all numbers are even so after 1200 will come 1400 and than 1600 so in kilograms the measurement is 1.4kg

Step-by-step explanation:

i hope this will help you :)

8 0
3 years ago
Read 2 more answers
A piano teacher has 4\dfrac124 2 1 ​ 4, start fraction, 1, divided by, 2, end fraction hours available to teach in a night. Each
Mila [183]

Question is Incomplete, Complete Question is given below.

A piano teacher has 4 1/2 hours available to teach in a night each lesson the last 1 1/2 hours how many lessons can the teacher schedule in a night.

Answer:

The Piano teacher can teach 3 lessons in night.

Step-by-step explanation:

Given:

Number of Hours Available = 4\frac{1}{2} \ hrs

4\frac{1}{2} \ hrs can be Rewritten as  \frac{9}{2} \ hrs

Number of hours for Each Lessons = 1\frac{1}{2} \ hrs

1\frac{1}{2} \ hrs can be Rewritten as  \frac{3}{2} \ hrs

We need to find Number of lesson that can be scheduled for night.

Number of lesson scheduled for night can be calculated by dividing number of hours available in night with number of hours each lesson would required.

Framing above sentence in equation form we get;

Number of lesson scheduled for night = \frac{\textrm{Number of Hours Available}}{\textrm{Number of hours for Each Lessons}}

Substituting the values we get;

Number of lesson scheduled for night = \frac{\frac{9}{2}}{\frac{3}{2}} = \frac{9\times2}{3\times2}=\frac{18}{6} =3

Hence The Piano teacher can teach 3 lessons in night.

6 0
2 years ago
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