Solve the problem.The charcoal from a tree killed in a volcanic eruption contained 64.7% of the 
found in living matter. How old is the tree, to the nearest year? Use 
for the half-life of 
A. 5700 years
B. 2482 years
C. 1720 years
D. 3581 years
Answer: D
Mathematics
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Find the surface area of the circular solid. Unless otherwise specified, use 3.14 for ? and round your answer to the nearest tenth.A sphere with r = 
in.
A. 2.3 in.2 B. 3.1 in.2 C. 2.0 in.2 D. 9.2 in.2
Mathematics
Find an equation for the ellipse described.Center (0, 0); major axis horizontal with length 18; length of minor axis is 16
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Write the point-slope form in slope-intercept form.y + 3 = -8(x - 2)
A. y = 8x + 12 B. y = -8x + 13 C. y = -8x + 11 D. y = -8x + 14
Mathematics
Find the interval(s) where 
is continuous.
a. [ 0, ?) b. [ –3. 3] c. (–?, ?) d. [–2,3]
Mathematics