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fgiga [73]
3 years ago
13

The time it takes to mow the lawn at a large Park m(x) varies inversely with the number of workers assigned to the job X it take

s 90 minutes to complete the job when three workers are assigned to it. Which equation can be used to find the time to complete job when its workers are assigned to it?
A. m(x)=279/x
B. m(x)=270x
C. m(x)=30/x
D. m(x)=30x
Mathematics
1 answer:
konstantin123 [22]3 years ago
5 0
I think the answer is A) 
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Answer:

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Step-by-step explanation:

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If a1rn-1 = 1/27, then 9(1/3)n-1 = 1/27

 

                                32(3-1)n-1 = 3-3

 

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So, 9 + 3 + 1 + ... + 1/27 = S6 = 9(1 - (1/3)6) / (1 - 1/3)

 

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                                              = (27/2)(728/729) = 364/27

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