A 5-ft tall man is walking away from a street light 10 ft high at a speed of 5 ft/sec. How fast is the tip of his shadow moving along the ground?
?
A. 3 ft/sec
B. 16 ft/sec
C. 5 ft/sec
D. 10 ft/sec
Answer: D
Mathematics
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.
?
A. By the definition means 
.
B. By the definition means 
.
C. By the definition means 
.
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A. 
B. 
C. 
D. 
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