Find the exact value of cos 135º.
?
A. ?
B. 
C. 
D. 
E. 
Answer: A
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Find the compound amount for the deposit. Round to the nearest cent.$5700 at 5.5% compounded annually for 9 years.
A. $6013.50 B. $9736.42 C. $9228.84 D. $8521.50
Solve the problem.The decibel level D of a sound is related to its intensity I by 
. If I0 is 10-12, then what is the intensity of a noise measured at 50 decibels? Express your answer in scientific notation, rounding to three significant digits, if necessary.
A. 5 × 10-10 watt/m2 B. 1 × 10-6 watt/m2 C. 1.48 × 1014 watt/m2 D. 1 × 10-7 watt/m2
Solve the problem.If v = 4i - 4j + k, find a vector perpendicular to both v and i + k.
A. 3i + 2j - 3k B. -4i - 3j + 4k C. 2i + 3j - 2k D. i - j + 3k
Solve the problem.How much work is required to move an object from x = 0 to x = 3 (measured in meters) in the presence of a constant force of 6 N acting along the x-axis?
A. 2 J B. 18 J C. 27 J D. ?