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8_murik_8 [283]
2 years ago
13

PLEASE HELPP! WORTH 20 POINTS

Mathematics
1 answer:
katrin2010 [14]2 years ago
8 0

Answer:

B

Step-by-step explanation:

Because

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Pat has been assigned the job of picking apples from the family orchard. He could do the job alone in 8 hours. He knows that his
schepotkina [342]

Answer:

3.7 hours

Step-by-step explanation:

Pat could do the job alone in 8 hours.

Patti could do the job alone in 7 hours

Output = Rate * time

Let the rate at which pat does the work = Rp

Let the rate at which Patti does the work = Rt

Let X be the total output

Rp * 8 = X

Rp = X/8

Rt * 7 = X

Rt = X/7

If both pat and Patti pick apples, we have

(Rp+Rt)T = X

(X/8 + X/7)T = X

[(7X + 8X)/56]T = X

[X(7+8)/56]T = X

Divide both sides by X

[(7+8)/56]T = 1

(15/56)T = 1

T = 56/15

T = 3.7 hours

8 0
3 years ago
Hello i would need help with this
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if u download photomath and take a picture of each problem it will give u a solution to each problem along with the steps of how they got that answer
5 0
2 years ago
Read 2 more answers
.The city of Heber, CA, has elevation 16 feet below sea level. Jacksonville's elevation is the opposite of Heber's. What is the
kodGreya [7K]

Answer:

B. 16 feet

Step-by-step explanation:

Hope it helped!

3 0
1 year ago
You work for a dress maker and your boss sends you to the fabric store to buy blue fabric she tells you to buy the best deal wha
PSYCHO15rus [73]
Given <span>20 yards for $30.00, unit rate = $30 / 20 yards = $1.5 per yard

Given 40 yards for $45.00, unit rate = $45 / 40 yards = $1.13 per yard

Given 50 yards for $70.00, unit rate = $70 / 50 yards = $1.4 per yard

Given 65 yards for $85.00, unit rate = $85 / 65 yards = $1.31 per yard

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4 0
3 years ago
Ancient paintings were found on cave walls in South America. The Carbon-14 in the paintings was measured and was found to be 19%
balu736 [363]

Answer: C. 13,839 (the answer is not among the given options, however the result is near this value)

Step-by-step explanation:

The exponential decay model for Carbon- 14 is given by the followig formula:

A=A_{o}e^{-0.0001211.t}  (1)

Where:

A is the final amount of Carbon- 14  

A_{o}= is the initial amount of Carbon- 14

t is the time elapsed (the value we want to find)

On the other hand, we are told the current amount of Carbon-14 A  is 19\%=0.19, assuming the initial amount of Carbon-14 A_{o}= is  100\%:

A=0.19A_{o} (2)

This means: \frac{A}{A_{o}}=0.19 (2)

Now,finding t from (1):

\frac{A}{A_{o}}=e^{-0.0001211.t}  (3)

Applying natural logarithm on both sides:

ln(\frac{A}{A_{o}})=ln(e^{-0.0001211.t})  (4)

ln(0.19)=-0.0001211.t  (5)

t=\frac{ln(0.19)}{-0.0001211}  (6)

Finally:

t=13713.717years  This is the age of the paintings and the option that is nearest to this value is C. 13839 years

6 0
2 years ago
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