The cost of producing x units of a certain commodity is C(x) = 1000 +5.70x + .7x^2 What is the instantaneous rate of change of C with respect to x when x =
100?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Frank is lending $1,000 to sarah for two years. frank and sarah agree that frank should earn a real return of 4 percent per year. instructions: a. the cpi (times 100) is 100 at the time that frank makes the loan. it is expected to be 113 in one year and 127.7 in two years. what nominal rate of interest should frank charge sarah?