Simulate the predator-prey equations. a. p (t ) =  p (t ) −  p (t ) r (t ) r (t ) = − r (t ) +  p (t ) r (t ) hint: i used the values alp=0.04; gam=0.08; bet=0.002; del=0.0004. b. add controls u, v to the predator-prey equations. p (t ) =  p (t ) −  p (t ) r (t ) + u (t ) r(t)= −r(t)+ p(t)r(t)+v(t) the controls could be predator or prey animals added or subtracted from the population (at some rate). suppose, for example, suppose prey animals are added at a fixed rate over a fixed period u(t)=u00 t1tt2  0 elsewhere investigate the impact of this control on the evolution of the population. c. find if possible, feedback control laws that can move the non-trivial equilibrium from its uncontrolled value to a target value. d. use the simulator to check the stability of the new (controlled) equilibrium.

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

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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? )