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Vladimir79 [104]
3 years ago
7

A cell phone company wants to predict the probability of a seventh grader in your city, City A, owning a cell phone. Records fro

m another city, City B, indicate that of seventh graders own a cell phone.
a. Assuming the probability of a seventh grader owning a cell phone is similar for the two cities, estimate the probability that a randomly selected seventh grader from City A owns a cell phone.
b. According to the data, which of the following is more likely?
 a seventh-grade male owning a cell phone
 a seventh grader owning a cell phone Explain your choice.
Mathematics
1 answer:
Sonja [21]3 years ago
3 0
Well, I can't see the numberes if any

so I can only answer part b

a 7th grader male or a seventh grader

there are male and female 7th graders so thereefor there is a greater probaility of having a 7th grader of any gender than a 7th grader male
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Katena32 [7]
Your answer to this question is B
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What is the answer to this definition? To place a dot at the point named by an ordered pair.?
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7 0
3 years ago
In 4 ​minutes, a conveyor belt moves 800 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt
kkurt [141]

Answer:

It takes 2 minutes 4 seconds to move the cans to storage area if both the belts are used.

Step-by-step explanation:

Given - In 4 ​minutes, a conveyor belt moves 800 pounds of recyclable

            aluminum from the delivery truck to a storage area. A smaller belt

            moves the same quantity of cans the same distance in 6 minutes.

To find - If both belts are​ used, find how long it takes to move the cans

              to the storage area.

Proof -

Given that,

Larger belt take 4 minutes to transfer the aluminium from delivery truck to storage area.

⇒ Time taken by Larger belt = 4 min/ shifting

Also,

Smaller belt take 6 minutes to transfer the aluminium from delivery truck to storage area.

⇒ Time taken by Smaller belt = 6 min/ shifting

Now,

As we know that Time is inversely proportional to time, so

Rate of Larger Belt = \frac{1}{4} shifting/min

Rate of Smaller Belt = \frac{1}{6} shifting/min

Now,

Let us assume that , if both belts used then,

Total time taken = x min/shifting

Then, Rate = \frac{1}{x} shifting/min

Now,

\frac{1}{4}  + \frac{1}{6}  = \frac{1}{x}

⇒\frac{6 + 4}{24} = \frac{1}{x}

⇒\frac{10}{24} = \frac{1}{x}

⇒10x = 24

⇒x = \frac{24}{10} = 2.4 minutes

∴ we get

It takes 2 minutes 4 seconds to move the cans to storage area if both the belts are used.

3 0
3 years ago
What is the area of the trapezoid?
IRINA_888 [86]

Answer:

69.75 square inches

Step-by-step explanation:

Add the top and bottom lengths then divide by 2 before multiplying it with the height

1/2x(3+12.5)=7.75

7.75x9=69.75

4 0
2 years ago
Read 2 more answers
If a square has a sides of 12xy+1 it's perimeter is
Rudik [331]
Side = 12xy+1

Perimeter = 4(12xy+1) 
Perimeter = 48xy + 4 (Answer B)
8 0
3 years ago
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