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liq [111]
3 years ago
5

Johnny uses the mirror placed on level ground to measure the height of a building. Johnny's eyes are 6 feet above the ground and

he stands 4 feet away from the mirror. From that distance, Johnny is able to see the top of the building in the mirror as shown in the diagram below.If the mirror is 45 feet away from the building’s base, how tall is the building?
Mathematics
1 answer:
ella [17]3 years ago
6 0

Answer:

Step-by-step explanation:

h/45=6/4

h=45(6)/4

h=67.5ft

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============================================

Work Shown:

s_4 = 18\text{ is the fourth term}\\\\s_5 = r*s_4 = 18r\\\\s_6 = r*s_5 = r*(18r) = 18r^2 = 72\\\\\text{So,}\\\\18r^2 = 72\\\\r^2 = \frac{72}{18}\\\\r^2 = 4\\\\r = \sqrt{4}\\\\r = 2

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