A pillow that usually costs $18 is marked down 25%. Which expressions can be used to find the new price of the pillow?
2 answers:
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Answer:
Janice and Karen could do in 1 day:
- <u>20% of the job</u>.
Step-by-step explanation:
To identify how much of the job could janice and caren do in 1 day, first, we must find how much of the job make just 1 person at the same rate:
If three persons make a job in 3 1/3 days, 1 person make the job in x:
- 3 persons ⇒ 3 1/3 days or 10/3 days
- 1 person ⇒ x
Then:
(we cancel the unit "persons")
- x = 10 days
Just a person would need 10 days to complete a job, now, we're gonna divide this value in 2 to obtain the time that need two persons to complete a job:
- Time to complete a job between 2 persons =
- Time to complete a job between 2 persons = 5 days
How two persons need 5 days to complete a job (in this case, the two persons are Janice and Karen), we can make a simple rule of three to obtain the percentage made in 1 day:
- 5 days ⇒ 100% of a job
- 1 day ⇒ x
Then:
(you can use the % if you want, the result is the same)
As you can see, <u><em>Janice and Karen just in a day could do 20% of the job</em></u>.
the decimals are commas and the double decimal is a real decimal
By applying the law of sines.
Given:
<span>GJ = 10 , ∠J =45° , ∠H = 31°
∴ </span><span>
∴ GH = 10 * sin 45° / sin 31° ≈ 13.7 m
</span>
Given:
<span>GJ = 10 , ∠J =45° , ∠H = 31°
∴ </span><span>
∴ GH = 10 * sin 45° / sin 31° ≈ 13.7 m
</span>