How can you calculate the preimeter of a rectangle

The pressure exerted by a certain liquid at a given point varies directly as the depth of the point beneath the surface of the liquid. The pressure at 80 feet is 240 pounds per square inch. What is the pressure at 10 feet? 

Please don't provide handwritten solution ....

A pedestrian crosses diagonally from one corner of a two kilometer by three kilometer City Park to the far corner. How far does the pedestrian walk? Give an exact answer and an approximation to three decimal places.

Find the rädivs of Connergence for

A rectangular photograph measuring 77 cm by 66 cm is to be displayed in a card mount in a rectangular frame as shown below, with a border of constant width x cm. The owner wants the area of the mount (including the photo) to be 73cm^2.   Find the width x of the border.The border should be ... cm wide (round your answer to three decimal places).

Calculate the distance between the points K =(-6,0) and F=(-1,8) in the coordinate plane . Round the answer to the nearest hundredth.

You are videotaping a race from a stand 132 ft. from the track, following a car that is moving at 180 mi/h (264 ft./sec), as shown in the accompanying figure. How fast will your camera angle 0 be changing when the car is right in front of you? Camera 132' Car

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The base of a triangle increases at a rate of 3 cm per minute while the height of the triangle decreases at a rate of 2 cm per minute. At what rate is the area of the triangle changing with respect to time when the height is 10 cm and the base is 15 cm? Be sure to write units for your answer.