The amount of a certain bacteria y in a petri dish grows accused riding to the equation dy/dt=ky, where k is a constant and t is measured in hours. if the amount of bacteria triples in 10 hours, then k=?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?