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Brrunno [24]
3 years ago
5

Help!!! Carla earns $6.25 per hour working at a store. When she gets her paycheck she repays her brother $40. She has at least $

120 left over. Rounding to the nearest hour, which is the minimum number of hours Carla worked?
Mathematics
1 answer:
lora16 [44]3 years ago
4 0
What i did was add 40 to 120 to get 160. then i devided 160 by the 6.25 she got per hour and i got 25.6 and rounded to 26 which would end up being the least amount of hours she could’ve worked. so 26 is the answer i’m pretty sure
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Step-by-step explanation:

A "critical number" is a function argument where the function has zero or undefined slope. A polynomial function never has undefined slope, so we're looking for the x-values where f'(x) = 0.

A graphing calculator easily shows the points that have zero slope. They are found at x = 3 and x = 6.

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The derivative will be zero where the factors are zero, at x=3 and x=6.

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For table # 1:

x= 1 * 3.5 = 3.5

x = 2*3.5 = 7

x = 3*3.5 = 10.5

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For table #2

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x =2 * 3 = 6

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Hence, the data sets show multiplicative relationships:

For data set 1 is 3.5 times x, and in data set 2 y is 3 times x.

8 0
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allsm [11]

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10 ft + 6 in

or:

<u>10.5 feet</u>
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