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Harrizon [31]
3 years ago
9

One grocery clerk can stock a shelf in 20 min. A second clerk requires 45 min to stock the same shelf. How long would it take to

stock the shelf if the two clerks worked together?
Mathematics
1 answer:
Lorico [155]3 years ago
8 0

<u>Answer: </u>

clerk A and clerk B can simultaneously stock a shelf in \frac{180}{13} minutes

<u>Explanation:</u>

Let the first clerk be A and the second clerk be B

A can stock a shelf in 20 min

B can stock a shelf in 45 min

Consider the complete work to be W

A’s rate of stocking = \frac{W}{20} per minute

B’s rate of stocking = \frac{W}{45} per minute

When, A and B work simultaneously, rate of work done = \frac{W}{20}+\frac{W}{45}

Total work done simulatenously = \frac{W}{\frac{W}{20}+\frac{w}{45}}

=\frac{20 * 45}{20+45}

Therefore, clerk A and clerk B can simultaneously stock a shelf in \frac{180}{13} minutes

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Figure ABCDE is the result of a 180 °rotation of figure LMNOP about the point.
Blababa [14]

Angle O in the pre-image corresponds to angle D in the image.

Step-by-step explanation:

Step 1; Shape LMNOP is rotated through 180° about point F to create the shape ABCDE. The highest point on LMNOP will be the lowest point on ABCDE and the lowest point on LMNOP will be the highest point on ABCDE. The highest point and the lowest point on LMNOP are P and N respectively. The highest and the lowest point on ABCDE are C and E. So Angle P equals angle E and angle N equals angle C.

Step 2; We measure the sides and assign the corresponding values from the first shape to the second shape.

Angle E = Angle P,

Angle D = Angle O,

Angle C = Angle N,

Angle B = Angle M,

Angle A = Angle L.

So angle D in the shape ABCDE corresponds to angle O in the shape LMNOP.

5 0
3 years ago
In 2021, the Internal Revenue Service (IRS) decreased the deductible mileage cost to 56 cents from 57.5 cents. Find the percent
Anon25 [30]

The deductible mileage cost has reduced by 2.16%

What is a percentage change?

A percentage change  compares the difference between the new amount and the old amount to the old amount.

I mean the percentage change is the new deductible mileage cost minus the old deductible mileage cost divided by the old deductible mileage cost

New deductible mileage cost= 57.5 cents

Old deductible mileage cost= 56 cents

percentage decrease=(56-57.5)/57.5

percentage decrease=-2.61%

The negative sign in -2.61% means that there was a percentage decrease in deductible mileage cost by 2.61%

In essence, the deductible mileage cost has been reduced by 2.16%

Hundredth of a percent means two decimal places.

Find out more on percent change on:brainly.com/question/2085058

#SPJ1

3 0
2 years ago
Someone plss help me
Alekssandra [29.7K]

Answer:

volume= length × width × height

7×5×11

35×11

385cm³

4 0
3 years ago
Retrying this question because no one wanted to help on the last one.
RUDIKE [14]

Answer:

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Step-by-step explanation:

3 0
3 years ago
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a blue whale weighs about 300,000 pounds, and a great white shark weighs about 4,000 pounds. how many times the weight of a grea
Tanya [424]
300,000 / 4,000 = 75

so the weight of the blue whale is 75 times bigger then the weight of the shark
3 0
3 years ago
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