substance a decomposes at a rate proportional to the amount of a present. it is found that 12 lb of a will reduce to 6 lb in 4.2 hr. after how many hours will there be only 1 lb left?

Afixed resistor has the following color bands: orange, red, brown, gold. what is the rated resistance

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

When was napoleon banopart born?