Help Frederick's brother is going on a hike. He has his backpack filled with supplies. His backpack weighs 400 ounces. How many pounds is Frederick's backpack?

Note: 1 pound = 16 ounces

Draw a scaled copy of the circle using a scale factor of 2

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)