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Q. An observer, whose eyes are 1.92m above the ground, is standing 31 m away from a tree. The ground is level and the tree is growing perpendicular to it. The observer's line of sight with the treetop makes an angle of 21° above the horizontal. How tall is the tree?

Q. On a cool morning, when the temperature is 13.0 degrees Celsius, you measure the pressure in your car tires to be 30.0 psi. After driving 50mi on the freeway, temperature of your tires is 56.0 degrees Celsius. What pressure will your tire gauge at the present show?

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