Specify the domain of the function.f(x) = 
A. x ? 4, x ? -4
B. x > 16
C. x ? 16
D. All real numbers
Answer: A
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Solve the problem.The range x of a projectile fired with velocity vo at an angle ? with the horizontal is given by 
where g is gravitational acceleration. Determine x in terms of vo and g for ? = 21°.
A. 
B. 
C. 0.67
D. 
Which of the following factors can contribute to students' math anxiety?
a. Verbal abuse from parents b. Teachers embarrassing students in front of their peers c. Excessive emphasis on instrumental instruction d. All of the above e. None of the above
Solve the problem.Anne and Nancy use a metal alloy that is 19.8% copper to make jewelry. How many ounces of an alloy that is 10% copper must be mixed with an alloy that is 24% copper to form 70 ounces of the desired alloy?
A. 49 oz B. 21 oz C. 23 oz D. 54 oz
Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 31°, find the length of OU accurate to four decimal places. 
A. 1.1666 B. 0.8572 C. 1.9416 D. 0.5150