Aplane flying over the ocean is on course to land on an aircraft carrier. the diagonal distance between the plane and the aircraft carrier is 10 miles. if the plane needs to maintain a constant descent angle of 20° with the horizontal to land on the aircraft carrier, then what is the plane's current height above the ocean in miles?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?