Answer 3/4w+8=w-7
3/4w-w= -7-8
-1/4w= -15
w= 60
Circumference of a white oak tree:
C = 90 in.
C = 2 r π
2 r π = 90
r · 6.28 = 90
r = 90 : 6.28
r = 14.33 in ( but it is not r in the formula )
Since the bark is 0.5 in thick: r = 14.33 - 0.5 = 13.83 in
a = r : w = 13.83 : 0.2 = 69.15 years
The widest ring is one that shows 69 years:
r = 69 · 0.2 = 13.8 in
A = r² π = 13.8² · 3.14 = 190.44 · 3.14 = 597.98 in²
Answer: The tree`s age is 69.15 years ( or 69 years and 2 months ) and the area enclosed by the outer circumference of the widest ring is 597.98 in².
S = the son's age
f = the father's age
In three years ,the sum of their ages will be 52.
(s + 3) + (f + 3) = 52
The age of a father is 2 less than 7 times the age of his son.
<span>7s - 2 = f
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Answer:
The store owner has two of each color weights
Step-by-step explanation: