Provide an appropriate response.When can direct substitution of a for x be used to find the limit of a function f(x) as x approaches a?
A. Always
B. When f is continuous for all x, except x = a
C. When f is continuous at a
D. Only when f is continuous for all x
Answer: C
Mathematics
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Solve the problem.A ball is thrown vertically upward from the top of a building 128 feet tall with an initial velocity of 112 feet per second. The distance s (in feet) of the ball from the ground after t seconds is 
After how many seconds does the ball strike the ground?
A. 10 sec B. 8 sec C. 129 sec D. 7 sec
Mathematics
Find the exact value of the logarithmic expression.log71
A. 1
B. 7
C. 
D. 0
Mathematics
Solve the equation.
- 
= 
A. 1
B. 
C. 
D. 
Mathematics
Find a rational zero of the polynomial function and use it to find all the zeros of the function.f(x) = x3 + 6x2 - x - 6
A. {1, -1, -6} B. {1, -1, 6} C. {1, 2, -3} D. {-1, 2, 3}
Mathematics