It takes 6hrs longer to cross a channel in a ferryboat when one engine of the boat is usd alone than when a second engine is used alone. using both engines , the ferryboat can make the crossing in 4hrs .how long would it take each engine , working alone ,to power the ferryboat across the channel

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

What is the slope of the line that contains the points (-2,1) and (0,-3)