When an electric current passes through two resistors with resistance r and s, connected in parallel, the combined resistance, r, can be calculated from the equation
image for when an electric current passes through two resistors with resistance r and s, connected in parallel, the comb
where r, r , and s are positive. assume that s is constant.
find dr/ dr
is r and increasing or decreasing function of r?
(enter increasing, decreasing, neither, or both (write both if there are values of r for which r is increasing, and other values for which it is decreasing; enter neither if this is a constant function.)

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )