Find the exact value of the expression. Do not use a calculator.cos 120° tan 60°
A. - 
B. 
C. - 
D. 
Answer: A
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Write the number as a Babylonian numeral.2200
A. 
B. 
C. 
D. 
Evaluate the expression using the given values.3xy - 
; x = 21, y = -5
A. 323 B. -325 C. -323 D. 325
Find the linearization of the function at the given point.
at 
A. 
B. L(x, y, z) = 
x + 4y + 5z
C. L(x, y, z) = 
x + 4y + 5z + 1
D. 
Solve the problem.The following points form a quadratic relationship: (1, 5.0), (2, 4.4), (3, 4.3), (4, 4.2), (5, 4.6), (6, 4.8), (7, 5.4), (8, 6.2) . The x-coordinates are the years a particular company has been in operation and the y-coordinates are the profit, in millions, for that year. Find the quadratic function that models the profit in millions as a function of x, the number of years of operation. Round to three decimal places.
A. y = 0.203x2 - 0.945x + 7.098 B. y = - 0.003x2 + 0.145x - 0.892 C. y = 0.099x2 + 1.254x - 3.512 D. y = 0.101x2 - 0.723x + 5.552