Which is farthest distance 3.345,3.35,or3.3 meters

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?