Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 3 ft/sec away from a lamppost that is 23 ft high. At what rate is the length of his shadow changing when he is 70 ft away from the lamppost? (Do not round your answer)
A. 35 ft/sec
B. 
ft/sec
C. 
ft/sec
D. 
ft/sec
Answer: D
Mathematics
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Solve the problem.Find an equation of the function f sketched below in the form 
. Use the vertex to find the values of h and k and use a second point on the graph to find the value of a.
A. f(x) = (x + 3)2 + 3 B. f(x) = (x + 3)2 - 3 C. f(x) = (x - 3)2 + 3 D. f(x) = (x - 3)2 - 3
Mathematics
Use substitution to determine whether the system of linear equations has no solutions, one solution, or infinitely many solutions.x + 2y = 0y = - 
x
A. Infinitely many B. One C. No solutions
Mathematics
Change the fraction to a decimal. Round as indicated.
thousandths
A. 0.153 B. 0.383 C. 0.765 D. 3.825
Mathematics
Add and, if possible, simplify.
+ 
A. 
B. 
C. 
D. 
Mathematics