What is the sum of 1370 cm, 1575 mm, and 8.63 m in meters

Can anybody me with this? ? (picture included.)

What is the rate of change in a objects position?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.