9 is a square number because when you use the dot diagram, 9 dots form a square. They are in a 3 by 3 square.
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Answer: it will take 5 people 6.4 hours to do the work.
Step-by-step explanation:
The number of hours required to do a job varies inversely as the number of people working. Let h represent the number of hours required to do the job. Let p represent the number of people working. Therefore,
h is inversely proportional to p
Introducing a constant of variation, k, it means that
h = k/p
It takes 8 hours for 4 people to paint the inside of a house. Therefore
8 = k/4
k = 8×4 = 32
The formula becomes
h = 32/p
To determine how many hours it will take 5 people to do the work, we will substitute p = 5 into the formula. It becomes
h = 32/5 = 6.4 hours
Im pretty sure it can. 20 +20 = 40. if that helps...
B I think not sure ......
Answer:
20% off 45.00 is 36.00
Step-by-step explanation:
The difference is $9.00
