A class of 23 students are going on a trip through some beautiful woods with their teacher. They suddenly come upon a river that is too wide to cross by foot. Luckily, there is a canoe nearby! The canoe is able to carry four people in it, however, it requires an adult to steer. How many trips back and forth across the river would it take for the entire class to cross the river using the one canoe?

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3