An oil refinery produces oil at a variable rate given by the following equation, where t is measured in days and Q is measure in barrels 900 ifOst30 Q'(t) 2200- 40t if 30 st<40 ift2 40 100 produced in the first 35 days? produced in the first 50 days? a. How many barrels b. How many barrels c. Without using calculus, determine the number of barrels produced over the interval [60,901 are are a. The oil refinery produced 31500 barrels in the first 35 days. b. The oil refinery producedbarrels in the first 50 days.

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