For Thursday

• Math SW1/HW1 (purple filler):
  • Oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a rate of 1m/s, how fast is the area of the spill increasing when the radius is 30m?
  • The volume of a sphere is changing at a rate of 4pi cm^3/s when the radius of the sphere is 2cm. How fast is the radius changing per second?
  • Given the rate of change of the radius, find the rate of change of the surface area.
  • A car traveling at a rate of 30 ft/s is approaching an intersection. When the car is 120 ft. from the intersection, a truck moving at 40 ft/s crosses the other. How fast are the 2 cars separating 2 seconds after the truck leaves the intersection?
  • A plane is flying at a constant speed at an altitude of 10,000 ft. on a line which will take it over an observer on the ground. At a given instant, the observer notes that the angle of elevation of the plane is pi/3 radians and is increasing at a rate of 1/30 rad/s. Find the speed of the plane.
• Math Quiz 1 tomorrow
• Chem LT 1: November 4 (Redox balancing)
• English: DIORAMA due on Friday, UB. @-)
• Bio lab erport due Friday next week.
• Econ LT tomorrow! :)