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galben [10]
3 years ago
11

Best Buy claims that 68% of people that walk into one of their stores end up not purchasing an item. To test this, they randomly

sample 30 customers at one of their locations. Is there enough evidence to show that the proportion of people who walk into Best Buy and don't buy anything is different than 68%
Mathematics
1 answer:
Tema [17]3 years ago
5 0

Answer:

Yes.

Step-by-step explanation:

As long as the individual's that have been selected as part of the study were actually selected randomly then yes. If there was no bias or other external factors affecting the probability of getting chosen then these individual's would clearly represent the entire population of Best Buy customers. Therefore, if the data gathered from these individuals results in being 68% of that population that does not buy anything then this would result in a valid claim by Best Buy.

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Two spherical balloons are filled with water. The first balloon has a radius of 3 cm, and the second has a radius of 6 cm.
lana [24]
<span>Sphere Volume   = </span><span>  4/3 • <span>π <span>• r³<span>

Small Balloon = </span></span></span></span><span>4/3 • 3.14<span> <span>• 3^3

</span></span></span><span>Small Balloon = 37.68 cc

Large Balloon =  </span><span>4/3 • 3.14<span> • 6^3</span></span>

Large Balloon =  <span> <span> <span> 904.32  </span> </span> </span> cc

<span> <span> <span> <span> Difference = (904.32 -</span></span></span>37.68) = </span> <span> <span> <span> 866.64 </span> </span> </span> cc

The larger balloon has <span> <span> <span> 866.64 </span> </span> </span> cc more water than the small balloon.


4 0
3 years ago
Why wasn't i doing this sooner :)
Licemer1 [7]

Step-by-step explanation:

Morning is 4 hr 15 min

afternoon is 4 hour 15 min

together is 8 hour 30 min

8.5*14 = 119 dollars

7 0
3 years ago
True or false.
valkas [14]

Answer:false

Step-by-step explanation:no constant rate of change in y and x values

8 0
3 years ago
A store owner uses a selling price of 125% of the cost of an item. If a pair of jeans has a sales price of $52.50, what cost doe
IgorC [24]

Answer:

The cost store owner pay for the pair of jeans is <u>$42</u>.

Step-by-step explanation:

Given:

A store owner uses a selling price of 125% of the cost of an item.

If a pair of jeans has a sales price of $52.50.

Now, to find the cost price of the store owner pay for the pair of jeans.

Let the cost price of jeans be x.

Sell price of jeans = \$52.50.

Now, to get the cost price of store owner pay for the pair of jeans:

<em>As given the</em><em> </em><em>store owner uses a selling price of 125% of the cost of an item.</em>

According to question:

125\%\ of\ x=52.50

\frac{125}{100} \times x=52.50

1.25x=52.50

<em>Dividing both sides by 1.25 we get:</em>

x=42.

<em>The cost price of jeans = $42.</em>

Therefore, the cost store owner pay for the pair of jeans is $42.

6 0
3 years ago
Plz answer this and explain how
Dahasolnce [82]

Answer:

Option H, π/3 and 2π/3

Step-by-step explanation:

sin x = sqrt(3) / 2

<em>It happens at 60 degrees and 120 degrees.  In radians, it is π/3 and 2π/3</em>

<em />

Answer:  Option H, π/3 and 2π/3

8 0
3 years ago
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