B can finish the job alone in 24 days.
In work-rate problems, a certain person can complete a fraction of the job for a specific timeframe. As stated in the problem, A and B can finish the job by working together for 8 days. It must be noted that the fraction of the job they can finish individually per day is additive.

A can complete the work in 12 days and finish 1/12 fraction of a job per day. This can be substituted directly to the equation to solve for the time B needed to finish the work.



This means that B can do 1/24 fraction of the job per day and can completely finish the job in 24 days.
For more rate work-rate problems, please refer to the link brainly.com/question/14464103.
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Answer:
35
Step-by-step explanation:
35
What is 50 percent (calculated percentage %) of number 70? Answer: 35.
Account B will cost less because
Account A will cost 0.2*20= $4
Account B will cost
0.1*20 +1.5= 2+1.5= $3.5
12%... (3×4)/(25×4) = 12/100... 12/100 = .12 which is 12%
Answer:
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Step-by-step explanation: