Sam kayaks on a river near his home. He plans to kayak a total of 6.4 miles. Sam kayaks at an average speed of 1.6 miles per hour. How many hours will it take Sam to kayak the 6.4 miles?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

Me. i can't figure out this question. give an explanation too. .