Given a = 7, b = 10, and c = 11, use the Law of Cosines to solve the triangle for the value of ?. Round your answer to two decimal places.
  Figure not drawn to scale

A. 62.96°
B. 80.44°
C. 78.46°
D. 38.57°
E. 60.33°

Answer: C

Mathematics

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Find the quotient  of the complex numbers. Leave answer in polar form.z1 = 30(cos 34° + i sin 34°)z2 = 5(cos 9° + i sin 9°)

A. 6(cos 25° + i sin 25°)
B. 25(cos 25° - i sin 25°)
C. 6(cos 43° + i sin 43°)
D. 25

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Mathematics

Solve.Byron rode his bicycle 6 miles on each of 4 days. What is the total distance Byron rode?

A. 27 miles
B. 24 miles
C. 10 miles
D. 27 miles

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Mathematics

Find the least common denominator. - 

A. 8a(a + 6) B. 8a + 6 C. 8a2 + 48 D. 8a2 + 6

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Mathematics

Solve the problem.A company has sales (measured in millions of dollars) of 50, 60, and 75 during the first three consecutive years. Find a quadratic function that fits these data, and use the result to predict the sales during the fourth year. Assume that the quadratic function is of the form y = ax2 + bx + c

A. y = x2 + x + 45; sales during the fourth year = $95 million
B. y = 5x2 + 5x + 40; sales during the fourth year = $180 million
C. y = -5x2 + 40x + 15; sales during the fourth year = $95 million
D. y = x2 - x + ; sales during the fourth year = $151.25 million

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Mathematics