What is the type of force that makes it balance?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Does anyone have the answers to online physics course plato course physics, semester a v3.0