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MArishka [77]
4 years ago
15

An internet company randomly selected 50 of

Mathematics
1 answer:
saveliy_v [14]4 years ago
7 0

Answer:

448 subscribers

Step-by-step explanation:

Given:

Number of randomly selected customers = 50

Out of 50 users, number using internet for more than 15 hours per week = 28

Now, number of subscribers = 800

Let the number of subscribers using internet for more than 16 hours per week be 'x'.

So, <em>out of 50 subscribers, 28 use internet for more than 15 hours</em>

Therefore<em>, out of 800 subscribers, 'x' use internet for more than 15 hours.</em>

Setting up a proportion and solving by cross multiplication method, we get:

\frac{28}{50}=\frac{x}{800}\\\\50\times x=28\times 800\\\\50x=22400\\\\x=\frac{22400}{50}\\\\x=448

Therefore, the number of subscribers using internet for more than 15 hours a week is 448 out of total 800 subscribers.

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Ross is shopping for mulch that costs $1.29$1.29 per cubic foot. During his first trip to the store, he bought 16.516.5 cubic fe
stich3 [128]
You add $1.29 and $1.29 and 16.5 and 16.5 and 4.5 and 4.5 and that equals $44.58.


I hope I helped you! :)


$1.29 + $1.29 + 16.5 + 16.5 + 4.5 + 4.5 = $44.58.

- Shelly O
8 0
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How many 8 oz bags of trail mix can be filled from a 10 pound bag of trail mix?​
dangina [55]

Answer:

20 bags

Step-by-step explanation:

6 0
4 years ago
A cone has a volume of 2,355 cubic inches and a height of 10 inches. How many inches is the diameter of the cone
Korvikt [17]

Answer:

Okay well first we right down what we already know:

- volume of 2,355 cubic inches  

- the height is 10 inches

Now we write down the equation for the volume of a cone:

V = πr²

lets plug in what we know into the equation                                      

2,355 = πr²

now we simplify to solve for r                          

2,355 / 10/3 = 706.5 = πr²                            

706.5/π = r²= 224.89

now since its r² we take the square root of 224.89                            

r = 15 inches

for diameter we multiply 15 by 2                            

diameter = 30 inches

4 0
3 years ago
in a small town named Irun, the population today is 5746. For the last 6 years, the population has grown by 12% every year. If t
mafiozo [28]

Answer: The correct answer is 20,236 people

Step-by-step explanation: If the population is 5746 people today and every year the population increases by 12%, this means that 690 more people come to Irun. (5746 x 0.12= 689.52 rounded to 690) Thus if you multiply 690 x 21 (years)= 14,490 people. 14,490 + 5746= 20,236 people in 21 years

6 0
3 years ago
Find parametric equations for the line through point P(-1,-1,-1) and Q(-5,7,3) A. x = t + 4; y = t - 8; z = -1t - 4
Elan Coil [88]

Answer:

B) x = -4t - 1; y = 8t - 1; z = 4t - 1

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given points are   P(-1,-1,-1) and Q(-5,7,3)

Let (x₁ , y₁ , z₁) =  P(-1,-1,-1)

Let (x₂ , y₂ , z₂) =   Q(-5,7,3)  

Parametric equation of the line passing through the points  (x₁ , y₁ , z₁) and      (x₂ , y₂ , z₂)

\frac{x-x_{1} }{x_{2}-x_{1}  }  = \frac{y-y_{1} }{y_{2}-y_{1}  } = \frac{z-z_{1} }{z_{2}-z_{1}  } = t

\frac{x-(-1)}{-5-(-1)} = \frac{y -(-1)}{7-(-1)} = \frac{z-(-1)}{3-(-1)}  = t

\frac{x-(-1)}{-4} = \frac{y -(-1)}{8} = \frac{z-(-1)}{4}  = t

Equating  each term

             \frac{x+1}{-4} = t

     ⇒  x + 1 = - 4 t

    ⇒   x = - 4 t -1

          \frac{y +1}{8}  = t  

         y + 1 = 8 t

     ⇒  y  = 8 t - 1

        \frac{Z+1}{4} =1

  ⇒  z +1 = 4t

   ⇒ z = 4t -1

<u><em>Final answer</em></u><em>:</em>-

parametric equations for the line through point P(-1,-1,-1) and Q(-5,7,3)

are

x = -4t - 1; y = 8t - 1; z = 4t - 1

                               

3 0
4 years ago
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