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noname [10]
3 years ago
11

Mr. Rodriguez, a college instructor, can grade his class papers in 3 hours while it takes his assistant 4 1/2 hours. If Mr. Rodr

iguez graded the papers for 1 hour and then left the job for his assistant to complete, how long will it take his assistant to finish grading papers?
Mathematics
1 answer:
cricket20 [7]3 years ago
7 0
3 1/2 hours because Rodriquez graded one hour of papers and if his assistant grades the class papers in 4 1/2 hours, it should only take him 3 1/2 hours since Rodriquez helped with an hour of it
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valina [46]

Answer:

The answer is below

Step-by-step explanation:

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given as:

z=\frac{x-\mu}{\sigma}\\\\where\ x=raw\ score,\mu=mean\ and\ \sigma=standard\ deviation \\\\For\ a\ sample\ size\ n: \\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }

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a) x > $100000

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P(x > 100000) = P(z > 0.91) = 1 - 0.8186 = 0.1814

b) n = 5

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z=\frac{100000-72641}{30000/\sqrt{5} }=2.04

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c) n = 10

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z=\frac{100000-72641}{30000/\sqrt{10} }=2.88

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4 0
3 years ago
Will mark BRAINLIEST and give 5 stars
JulsSmile [24]

Answer:

364

Step-by-step explanation:

Hope this helps.

3 0
3 years ago
Mr. Clark has a tank that holds 55,000 milliliters of gas. He poured some gas into three containers equally. There were 19,864 m
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Answer:

35,136 ml

Step-by-step explanation:

The tank holds 55,000ml. Mr. Clark poured some gas into 3 container, and at the end there the tank had 19,864. To find how much gas was poured out of the tank it is the same as asking how much gas he poured in the 3 containers, all together. We have to find the difference, subtraction:

55,000 - 19,864 = 35,136ml were poured in the 3 containers or amount of gas poured out of the tank.

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3 years ago
imagine you live only one mile from work and you decide to walk.if you walk four milesb per hour how long will it take you to wa
olga nikolaevna [1]
1 mile * (1 hr / 4 mile) = 1/4 hr

1/4 hr = 15 min
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3 years ago
Help! 15 Points, FRACTIONS.
Dafna11 [192]

Answer:

7/8 estimated would be about 1 and 6/11 is almost a half so it would be estimated 1/2 so 1 - 1/2 = 1/2

3 0
2 years ago
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