Solve by factoring and using the principle of zero products.a2 - 17a + 60 = 0

A. 12, 5
B. -60, -1
C. -12, -5
D. 1, 60


Answer: A

Mathematics

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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk 

A. T = (tanh t)i  + j  + (sech t)k; N = (sech t)i  - (tanh t)k 
B. T = -  (tanh t sech t)i  + j  + (sech t)k; N = (-sech t)i  - (tanh t)k 
C. T = (tanh t sech t)i  + j  + (sech t)k; N = (sech2 t)i  - (sinh t)k 
D. T = - (tanh t)i  + j  + (sech t)k; N = (-sech t)i  - (sinh t)k 

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Rewrite the series using summation notation. Use 1 as the lower limit of summation. +  +  + . . . + 

A.
B.
C.
D.

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Solve the problem.In one city, the local cable TV company charges $2.85 for each pay-per-view movie watched. In addition, each monthly bill contains a basic customer charge of $17.50. If last month's bills ranged from a low of $28.90 to a high of $43.15, over what range did customers watch  movies?

A. movies watched varied from 3 to 8 inclusive B. movies watched varied from 3 to 10 inclusive C. movies watched varied from 5 to 10 inclusive D. movies watched varied from 4 to 9 inclusive

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Find the difference.(0.67) - (-0.17)

A. -0.4 B. -0.1139 C. 0.84 D. -0.5

Mathematics