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_______________ exerted great influence during the Middle Ages due through the more than 400 letters she wrote to Popes and other church leaders urging action on social issues such as caring for the poor.

During the Middle Ages, the works of Aristotle and others were lost, therefore teachers of rhetoric only had individual sentences or fragments of sentences on which to base their understandings of ancient works. These fragments were known as_______________. 

Find f”(x) for the function.f(x) = 8×4 – 6×2 + 5

Find the derivative.y = e2x2 + x

Find the derivative.y = e7x2 + x

Give an appropriate response.Find the limit of f(x) as x approaches 4 from the right.f(x) = 

Solve the problem.A rectangular field is to be enclosed on four sides with a fence. Fencing costs $5 per foot for two opposite sides, and $8 per foot for the other two sides. Find the dimensions of the field of area 850 ft2 that would be the cheapest to enclose.

Find the derivative.y = e3x2 + x

Solve the problem.Given the revenue and cost functions R = 32x – 0.4×2 and , where x is the daily production, find the rate of change of profit with respect to time when 30 units are produced and the rate of change of production is 4 units per day.

Solve the problem.Given the revenue and cost functions R = 26x – 0.3×2 and , where x is the daily production, find the rate of change of profit with respect to time when 20 units are produced and the rate of change of production is 4 units per day.