Suppose a certain traffic light shows a red light for 43 seconds, a green light for 45 seconds, and a yellow light for 5 seconds. if you look at this light at a randomly chosen instant, what is the probability that you see a red or yellow light? (enter your probability as a fraction.)

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9