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ANEK [815]
2 years ago
13

Mike's electronics store sold the following number of cellphones on each of the seven days of a week. DayCell Phones Sold Sunday

12 Monday10 Tuesday9 Wednesday5 Thursday14 Friday10 Saturday10 The mean number of cell phones sold by the store for the week was __________. 9 phones 70 phones 10 phones 5 phones
Mathematics
1 answer:
bulgar [2K]2 years ago
6 0

Answer:

  (c)  10 phones

Step-by-step explanation:

The mean is the sum divided by the number of contributors:

  (12 +10 +9 +5 +14 +10 +10)/7 = 70/7 = 10

The mean number of phones sold for the week was 10 phones.

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A diving board is 10 feet above the surface of the water. At time t = 0, the board propels Chris upward at a rate of 12 feet per
Art [367]

Answer:

Chris will take 0.75 seconds to return to his starting height of 10 feet.

Step-by-step explanation:

Let the height of Chris be represented by h(t) = -16\cdot t^{2}+12\cdot t +10, where h(t) is the height in feet and t, the time in seconds. First, we equalize the formula to a height of 10 feet and simplify the resulting expression, that is:

-16\cdot t^{2}+12\cdot t +10 = 10

-16\cdot t^{2}+12\cdot t = 0

Then, we simplify the expression by algebraic means:

-16\cdot t\cdot \left(t-\frac{3}{4} \right) = 0

Roots of the polynomial are, respectively:

t = 0\,s\,\lor \,t = 0.75\,s

First root represents the initial height of Chris, whereas the second one represents the instant when Christ returns to the same height above the surface of the water. Hence, Chris will take 0.75 seconds to return to his starting height of 10 feet.

5 0
2 years ago
Jay King, owner of a local Bed and Bath Store knows that his customers will only pay at most, $299 for a blow up bed. Assuming J
Roman55 [17]
If you would like to know the price Jay can pay the manufacturer for the blow up bed, you can calculate this using the following steps:

100% + 40% = 140%

140% of x is $299
140% * x = 299
140/100 * x = 299      /*100/140
x = 299 * 100 / 140
x = $213.6

40% of $213.6 = 40% * 213.6 = 40/100 * 213.6 = 85.44
$213.6 + $85.44 = $299

The correct result would be $213.6.
6 0
3 years ago
The mean of the Normal distribution determines the ___________ of the distribution. Please complete the sentence by selecting on
tamaranim1 [39]

Step-by-step explanation:

location

of the distribution.

5 0
1 year ago
I have a problem from precalculus cosx/1-tanx +sinx/1-cosx =cosx+sinx prove the identity
vovangra [49]

Answer:

see attachment

Step-by-step explanation:

7 0
3 years ago
Help A fellow out plz
dimulka [17.4K]
$143.75/6.25=23 hours
3 0
2 years ago
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