Using the variable x, write the interval as an inequality.
A. 3 ? x ? 7
B. x < 3 or x > 7
C. 3 < x ? 7
D. x < 3 or x ? 7
Answer: D
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Solve the problem.The dimensions of a cardboard box were measured as 30 cm, 90 cm and 40 cm, with the percentage error in each dimension not exceeding 6 percent. Approximate the worst possible percentage error in the volume of the box. Assume that the cardboard is of negligible thickness.
A. 13% B. 18% C. 6% D. 12%
Solve the problem.After being struck with a hammer, a gong vibrates 27 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 108 vibrations B. 31 vibrations C. 36 vibrations D. 118 vibrations
Provide an appropriate response.Simplify: 
A. 
B. 
C. 
D. 
Sketch the graph of the quadratic function.f(x) = 
(x - 2)2 + 4
A. 
B. 
C. 
D. 