Aperson standing at point c measures the angle of elevation to a point, a, at the top of a perpendicular cliff, to be 18°. after moving 2,200 feet directly toward the foot of the cliff, the person measures the angle of elevation to point a as 56°.
the height of the cliff is feet.

The height of the cliff is approximately 915 feet.

Step-by-step explanation:

Refer to the diagram attached. Let B represent the point on the ground where the cliff measures an angle of elevation of 56°. Let AH be the height of triangle ABC on the base BC. H is on both line AH and line BC.  

The three angles of triangle ABC will be:

Only the length of segment BC is known. To find the height of the cliff, start by finding the length of segment AB. Apply the law of sine.

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In the triangle ABH,

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step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: