i have a school thing in edmentume but there are two things that show up to be tutorial only but i still have not been able to complete them even thogh i done the tutorial does anyone know anything about this please help me out

An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?

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?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass