math
posted by jas .
can someone write out the equations so i can solve this please.
Midtown delivery service delievers packages which cost $ 2.10 per package to deliver. The fixed cost to run the delivery truck is $ 78 per day. If the company charges $4.10 per package, how many packages must be deliverd daily to make a profit of $36?
Profit= (4.12.1)*N 78
solve for N

Charges of −4q are fixed to diagonally opposite corners of a square. A charge of + 5q is fixed to one of the remaining corners, and a charge of + 3q is fixed to the last corner. Assuming that ten electric field lines emerge from the + 5q charge, sketch the field lines in the vicinity of the four charges.
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