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Title: The traffic flow rate (cars per hour) across an intersection is r ( t ) = 400 + 900 t − 90 t 2 ... Post by: Catracho on Jul 31, 2019 Q. The traffic flow rate (cars per hour) across an intersection is r ( t ) = 400 + 900 t − 90 t 2, where t is in hours, and t = 0 is 6am. How many cars pass through the intersection between 6 am and 9 am?
Q. A company's marginal cost function is 9/sqrt(x) where x is the number of units. Find the total cost of the first 81 units (from to x=81) Total cost: Title: Re: The traffic flow rate (cars per hour) across an intersection is r ( t ) = 400 + 900 t − 90 t .. Post by: bio_man on Jul 31, 2019 Here's my take on the first question. >>See attachment<<
For the second part, try an answer of 162, I found this by taking the integral between 0 and 81 for the function given. |