What type of current do power lines transmit and why?

a. ac current, because ac current transmits more efficiently

b. dc current, because dc current transmits more efficiently

c. ac current, because ac current is safer

d. dc current, because dc current is safer

A (Brainiest pls)

Explanation:

Resistor is the passive component that reduces the flow of current. Switch is the electrical device that turns on or off the current by closing and opening the electrical circuit.

answer; ///(b) it is composed of four protein chains and four heme groups;

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles