Find a formula for the nth term of the sequence.-8, -7, -6, -5, -4 (integers beginning with -8)
A. an = n - 8
B. an = n + 8
C. an = n - 7
D. an = n - 9
Answer: D
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Calculate the surface area of the given surface.The surface f(x,y) = x2 + y2, -1 ? x, y ? 2. (Hint: Do the first integral by substitution or using a formula from the Table of Integrals. Use numerical integration to do the outer integral.)
A. 35.5222 B. 18.4734 C. 25.3332 D. 29.3516
Decide whether the statement is true or false.There is no angle that is the complement of an obtuse angle.
A. True B. False
Differentiate the function.r(t) = (-8t2 - 11)i + 
j
A. r'(t) = (-16t)i - 
j
B. r'(t) = 
i + (-16t)j
C. r'(t) = (-16)i + 
j
D. r'(t) = (-16t)i + 
j
Use the associative property of multiplication to write an equivalent algebraic expression.9(6(a + b))
A. (9 + 6)(ab) B. (9 ? 6)(a + b) C. 9((6a) + b) D. (6(a + b))9