Find the exact value of the following expression without using a calculator.sec (45°)
A. 1
B. 
C. 
D. 
Answer: C
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Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Solve the problem.The weekly sales in thousands of items of a product has a seasonal sales record approximated by 
(t is time in weeks with 
referring to the first week in the year). During which week(s) will the sales equal 79,020 items?
A. week 4 and week 47 B. week 30 and week 47 C. week 21 and week 30 D. week 4, week 20, and week 52
Find the outer diameter (the length AB) of the parabolic reflector shown below.
?
?
; 
?
Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
The graph of either a cubic or quartic polynomial f(x) with leading coefficient ±1 and integer zeros is shown. Write the complete factored form of f(x).
A. f(x) = x(x + 2)(x - 4) B. f(x) = -x(x - 2)(x + 4) C. f(x) = x(x - 2)(x + 4) D. f(x) = -x(x + 2)(x - 4)