youssef

how to get 537 out of 579494 ?

i want a mathematic equation to apply on the number 579494 and get as a result the number 573 ,they told me that its simple but i can't figure it out(if somebody find many ways please give it all ).thanks

A charge of +80 mC is placed on the x axis at x = 0. A second charge of -50 mC is placed on the x axis at x = 50 cm. What is the magnitude of the electrostatic force on a third charge of 4.0 mC placed on the x axis at x = 30 cm?

find the sum of the arithmetic series 7+4+1+....+(32).