Find the exact value by using a half-angle identity.cos 
A. 
B. - 
C. - 
D. 
Answer: A
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Provide an appropriate response.
A "2x4" board is originally cut at 2 in. by 4 in. If the curing and finishing process give a final measurement of 
in. by 
, what percent in width is lost in the process?
A. 75% B. 25% C. 50% D. 34.75%
Solve.Using the formula to find Fahrenheit (F) in terms of Celsius (C), F = 
C + 32, find the range (to the nearest tenth) of the Fahrenheit temperature when the range of the Celsius temperature is between 2°C and 6°C, inclusive.
A. Between 33.1°F and 32.8°F, inclusive B. Between 19.6°F and 26.8°F, inclusive C. Between 3.6°F and 10.8°F, inclusive D. Between 35.6°F and 42.8°F, inclusive
Solve the problem.If a rock falls from a height of 80 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 80 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 16.33 sec B. 3.33 sec C. 4.04 sec D. 1.83 sec
Find the remaining sides of a 30° - 60° - 90° triangle if the longest side is 10. ?
A. 
, 
B. 4, 
C. 3, 
D. 5, 
E. 
, 