If, during the hours of heavy traffic on a bridge, the traffic is considered random with a volume of 960 vehicles per hour per lane, determine, for this lane, the probability of: a. not more than 3 cars in an interval of 15 seconds
b. at least 6 cars in the same time interval.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Mrs.sling bought a pound of green beans for $1.80. how much will mrs.tennison pay for 3 1/2 pounds of green beans?