tanaemichel
04.02.2020 •
Mathematics
Atree is 8ft tall and grows 8 inches each year. in how many years will the tree reach a height of 30 feet?
a.27
b.33
c.45
d.52
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Ответ:
B
Step-by-step explanation:
30 ft = 360 in
8 ft = 64 in
360 in - 64 in = 296 in
296 / 8 = 33
Ответ:
=tan (π-π/6)
=(tan π-tan (π/6))/(1+tan π tan π/6)
=-tan (π/6)
=-1/√3
=-√3/3
Hence the answer is: -√3/3