a car headlamp bulb draws 1.9 a from the battery. how much charge flows through the bulb
in 5.0 minutes?

570 Coulombs

We are given;

We are required to calculate the charge that flows through the bulb;

Q = It

where, Q is charge in coulombs, I is the current and t is time in seconds.

In this case;

Time = 5.0 minutes

But, 1 min = 60 seconds

Time = 300 seconds

Thus;

Charge, Q = 1.9 A × 300 seconds

                  = 570 Coulombs

Hence, the charge through the bulb is 570 Coulombs

the part of the wave he is travelling on is the crest

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.