Use a calculator set in degree or radian mode, as appropriate, to find the value of each expression to four decimal places.cos 12°
A. 0.9732
B. 0.9781
C. 0.8439
D. 0.8427
Answer: B
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State the domain and range of the function.f(x) = 
A. Domain = (-?, ?); range = (7, ?) B. Domain = (-?, ?); range = (0, 7) C. Domain = (-?, ?); range = (-?, ?) D. Domain = (0, ?); range = (-?, ?)
Solve the problem. Use the correct number of significant digits.The kinetic energy E of an electron in a television picture tube is given by E = 
mv2, where E is in joules, m is the mass of the electron in kilograms, and v is its speed in meters per second. Find the kinetic energy of an electron if its speed is 
(The mass of an electron is 
A. 3.8 × 10-24 J B. 3.1 × 10-19 J C. 6.3 × 10-17 J D. 3.1 × 10-17 J
Find the angle of least positive measure coterminal with the given angle.1280°
A. 20° B. 560° C. 110° D. 200°
Factor the polynomial.x2 - x - 72
A. (x + 1)(x - 72) B. (x + 8)(x - 9) C. (x + 9)(x - 8) D. prime