Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.an = an-1 + 5, a1 = 18
A. an = 18n - 13, a20 = 347
B. an = 5n + 13, a20 = 113
C. an = 13n + 5, a20 = 265
D. an = 5n + 23, a20 = 123
Answer: B
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A. 0.91 B. 0.87 C. 0.82 D. 0.86
Find an equation of the tangent line at x = a.y = 
; a = 4
A. y = 8x - 64 B. y = 64x + 24 C. y = 24x - 64 D. y = 8x + 64
Determine the sum or difference in the given clock arithmetic.4 - 3 (clock 7)
A. 3 B. 5 C. 1 D. 2
Solve the problem.A controlled placebo experiment is said to be double-blind when
A. the members of the control group are told they are in the treatment group and vice versa. B. none of the scientists conducting the study know which patients are in the control group and which patients are in the treatment group. C. neither the members of the control group or the members of the treatment group know to which of the two groups they belong. D. neither the subject nor the scientists conducting the study know which individuals are in the treatment group and which are in the control group. E. none of these