Write an expression that represents the height of a tree that begins at 7 feet and increases by 2 feet per year. Let t represent the number of years.
(Type integers or decimals.)
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H(t) = 7 + 2t.

Step-by-step explanation:

H(t) means the height at time t:

H(t) = 7 + 2t.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,