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FromTheMoon [43]
4 years ago
13

Sara, Kim, and John own a painting company. To paint a particular home, Sara estimates it would take her 4 days. Kim estimates 5

.5 days. John estimates 6 days. How long would it take them to work together to paint the house.
Mathematics
1 answer:
Vitek1552 [10]4 years ago
7 0

Answer:

1.67 days

Step-by-step explanation:

Sara can finish 1/4 work a day

Kim can finish 1/5.5 work a day

John can finish 1/6 work a day

if they work together one day can do: 1/4 + 1/5.5 + 1/6 = 79/132

79/132 * x days = 1

x = 132/79 = 1.67

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Answer:

False

Step-by-step explanation: A rational number is any number can be expressed as a fraction. Whereas, a whole number is a positive number without a decimal or fractions. Every rational number is may or may not be a whole number.

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3 years ago
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35.12 divided by 21.95
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Answer:

1.6

Step-by-step explanation:

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3 years ago
A window has the shape of a semicircle. The base of the window is measured as having diameter 64 cm with a possible error in mea
Tanzania [10]

Answer:

e. 1.6π cm²

Step-by-step explanation:

Since the window is in a semi-circular shape, its area A = πD²/4 ÷ 2 = πD²/8 where D = diameter of window = 64 cm

Now, the error in the area dA = dA/dD × dD where dD = error in the diameter = 0.1 cm and dA/dD = derivative of A with respect to D.

So, dA/dD = d(πD²/8)/dD = 2 × πD/8 = πD/4

So, the differential dA = dA/dD × dD

dA =  πD/4 × dD

Substituting D = 64 cm and dD = 0.1 cm into the equation, we have

dA =  πD/4 × dD

dA =  π × 64 cm/4 × 0.1 cm

dA =  π × 16 cm × 0.1 cm

dA =  π × 1.6 cm²

dA = 1.6π cm²

So, the maximum error in computing the area of the window is 1.6π cm²

3 0
3 years ago
Summer earns extra money raking leaves in the fall. She earns $20 per week raking leaves and gets paid on
Anit [1.1K]

Answer:

rudiiytdtgffiytf8yg8ycuf

Step-by-step explanation:

7 0
3 years ago
I don't know I haven't been on math for a 8 days
kozerog [31]

Answer:

C. the diameter would be 10 making the answer 10pi

Step-by-step explanation:

the diameter would be 10 making the answer 10pi

2(5)pi

10pi

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2 years ago
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