Find the values for b such that the trinomial is a square.x2 + bx + 81
A. 
, - 
B. 9, -9
C. 36
D. 18, -18
Answer: D
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Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.
A. 1.00 × 10-11 B. 1.11 × 10-10 C. 9.09 × 10-13 D. 8.33 × 10-14
Solve the problem.The following graph shows weekend gross revenue for a summer blockbuster film. 
Find the total revenue the film earned over the first two weekends.
A. $207,392,640 B. $56,446,325 C. $175,601,895 D. $119,155,570
Write the vector v in terms of i and j whose magnitude 
and direction angle ? are given.
= 12, ? = 180°
A. v = -12i - 12j B. v = -12j C. v = 12j D. v = -12i
Solve the problem.Your starting salary for a new job is $30,000 per year. You are offered two options for salary increases: Option 1: an annual increase of $1000 per year or Option2: an annual percentage increase of 4% of your salary.Your salary is a function of the number of years of employment at your job. Write an equation to determine the Salary S after x years on the job for each option.
A. Option 1: S = 30,000 + 1000x Option 2: S = 30,000(1.04)x B. Option 1: S = 30,000x + 1000 Option 2: S = 30,000x1.04 C. Option 1: S = 1000x Option 2: S = (1.04)x D. Option 1: S = 30,000(1000x) Option 2: S = 30,000 + (1.04)x