4. If two resistances R1 and R2 are connected in parallel, then the resultant resistance is

A)R1+R2

B)R1-R2

C)R1R2 by R1+R2

D) R1+R2 by R1R2

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet. what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet