If the interest rate is 10%, then $1 today is worth how much one year from now?

When Ford decides to increase production of hybrid cars, it directly answers the ________ question

A) what B) how C) for whom D) where E) why

If an individual's utility function is quasi-concave, his or her MRS will:

a. diminish as x is substituted for y. b. increase as x is substituted for y. c. be undefined except in special cases. d. always depend only on the ratio of x to y.