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3 years ago

Kristen worked 39 hours in 6 days.

Mathematics

2 answers:

LenaWriter [7]3 years ago

7 0

Answer:

39/6 = 6.5

6 hours 30 minutes

<h2><u><em>Hope it helps!!!!!brainliest pls!!!!!!!!</em></u></h2>

Eddi Din [679]3 years ago

5 0

Answer:

6.5 hours per day

$321.75

Step-by-step explanation:

Given Kirsten worked 39 hours in 6 days:

Number of hours worked in one day = 39 ÷ 6 = 6.5 hours

Given Kirsten is paid $8.25 per hour:

Total pay for 39 hours = 39 × 8.25 = $321.75

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4 years ago

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Let x represent side opposite to highway and y represent other two opposite sides as shown in the diagram.

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We know that area of rectangle is length times width, so area of parking lot will be $A=x\cdot y$

Upon substituting value of x, we will get:

$A(y)=(440-2y)\cdot y$

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Now we will find the derivative of area function as:

$A'(y)=\frac{d}{dy}(440y)-\frac{d}{dy}(2y^2)$

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Let us find critical point by equating derivative to 0.

$440-4y=0$

$440=4y$

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Now we will substitute this value is equation $x=440-2y$ to solve for x as:

$x=440-2(110)$

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Therefore, the dimensions of 220 feet by 110 feet will enclose the maximum area.

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