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Helen [10]
3 years ago
14

From a distance of 42 feet from the base of a building, the angle of elevation to the top of the building is 67 Estimate the hei

ght of the building to the nearest foot.
a.

18 feet

c.

39 feet
b.

16 feet

d.

99 feet
Mathematics
1 answer:
mamaluj [8]3 years ago
5 0
Because the problem represents right angle we can use simple geometric functions to determine size of sides of triangle and its angles if needed.

Since we have angle at point that is 42 feets away from base of the building and we need lenght of side that is oposite from that angle that means that we need some trigonometric function that includes those 2 sides.

that function is tangens.
tan67 = oposite side/side next to angle

tan67 = x/42
x = 42*tan67
x = 98.94 feet

Answer is D 99 feet
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Knowing that in that day they sold 14 diet sodas, you can write the following proportion:

\frac{7}{6}=\frac{14}{x}

Now solve for "x":

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well, the sequence goes, 1100, to 1135, to 1170.... notice, is simply adding 35 to get the next term, so the common difference is 35, and the first term is 1100 of course.


\bf n^{th}\textit{ term of an arithmetic sequence}
\\\\
a_n=a_1+(n-1)d\qquad
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\[-0.5em]
\hrulefill\\
a_1=1100\\
d=35\\
a_n=3725
\end{cases}
\\\\\\
3725=1100+(n-1)35\implies 3725=1100+35n-35
\\\\\\
3725=1065+35n\implies 2660=35n\implies \cfrac{2660}{35}=n\implies 76=n

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