In Exercise, solve the given problems.A laser beam 6.80 mm in diameter is incident on a pl...

In Exercise, solve the given problems.

A laser beam 6.80 mm in diameter is incident on a plane surface at an angle of 62.0°, as shown in Fig. 1. What is the elliptical area that the laser covers on the surface? (See Exercise 1.)

Fig. 1

Exercise 1

In Exercise, solve the given problems.

The vertical cross sections of a horizontal tank 20.0 ft long are ellipses, which can be described by the equation 9x2 + 20y2 = 180, where x and y are measured in feet. The area of an ellipse is A = πab. Find the volume of the lank.