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Semenov [28]
3 years ago
6

A man can harvest his farm in 18 hours. his son can harvest the same farm in 12 hours. how long will it take them working togeth

er?]
Mathematics
2 answers:
Oxana [17]3 years ago
7 0
Answer: 7.2 hour

Explanation:

\textnormal {Both of them work together =}  \cfrac{18 \times 12}{18 + 12} = 7.2 \textnormal { hours}

yanalaym [24]3 years ago
5 0
I think you would do 18+12=30 and half of 30 is 15 so,They would only work 15 hours.
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8. Expand, then simplify: (2 Points) (2a – 3) (a2 + 3a - 5) ​
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3 years ago
The local supermarket buys lettuce each day to ensure really fresh produce. Each morning any lettuce that is left from the previ
jekas [21]

Given Information:

Cost price = $4

Selling price = $10

Salvage value = $1.50

Average demand = μ = 250 boxes

Standard deviation = σ = 34 boxes

Required Information:

Number of lettuce boxes = ?

Answer:

The supermarket should purchase 268 boxes  of lettuce

Step-by-step explanation:

The required number of lettuce boxes that supermarket should purchase is given by

Number of lettuce boxes = μ + (z*σ)

Where μ is the average demand of lettuce boxes, σ is the standard deviation, and z is the z-score which is given by

p = C_us/(C_us + C_os)

The z-score corresponding to probability p will be obtained.

The cost of under stocking is given by

C_us = Selling price - Cost price

C_us = $10 - $4

C_us = $6

The cost of over stocking is given by

C_os = Cost price - Salvage value

C_os = $4 - $1.50

C_os = $2.50

p = C_us/(C_us + C_os)

p = 6/(6 + 2.50)

p = 0.7058

p  = 70.58%

The z-score corresponding to 70.58% probability is approximately 0.54

Number of lettuce boxes = μ + (z*σ)

Number of lettuce boxes = 250 + (0.54*34)

Number of lettuce boxes = 250 + (18.36)

Number of lettuce boxes = 268.36

Number of lettuce boxes ≈ 268

Therefore, the supermarket should purchase 268 boxes of lettuce.

How to use z-table?

Step 1:

In the z-table, find the probability you are looking for and note down the two-digit number of the given row. (e.g 0.5, 2.2, 0.5 etc.)

Step 2:

Then look up at the top of z-table and note down the value in the column for the remaining decimal point in the range of 0.00 to 0.09.

Step 3:

Finally, add the numbers obtained from step 1 and step 2.

8 0
3 years ago
Plz guys help me In 2 please
Doss [256]

Answer:

Step-by-step explanation:

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M becomes (2, -1)

N becomes (-3, -1)

P becomes (-1, -4)

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