Solve the problem.From the top of a vertical tower, 398 feet above the the surface of the earth, the angle of depression to a dog house is 
How far is it from the dog house to the foot of the tower? Round your answer to the hundredths place.
A. 996.66 ft
B. 968.67 ft
C. 984.26 ft
D. 1086.86 ft
Answer: C
Mathematics
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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
Mathematics
Solve.The sum of the areas of two square plots of land is 2122 m2 and the difference of their areas is 1240 m2. Find a length of a side of each plot.
A. 22 m, 62 m B. 40 m ,20 m C. 5.25 m, 41 m D. 41 m, 21 m
Mathematics
Factor out the GCF.5x2 + 15x - 20
A. 5(x2 + 3x - 4) B. 5(x2 + 15x - 20) C. 5(x2 + 10x - 15) D. 5x(x + 3 - 4)
Mathematics
Find the expected value for the random variable.
A. 9.72 B. 7.8 C. 9 D. 7.05
Mathematics