There are three source of resistance in parallel circuit. two of them are rated at 20 ohms, the other at 10 ohms. what is the circuits total resistance

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

What is the measure of angle afe? 79 81 91 99

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?