Perform the indicated operation.
? 
A. 
B. 
C. x - 3
D. x + 3
Answer: D
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Graph the function.y = 2 sin (?x)
A. 
B. 
C. 
D. 
Solve the problem.At the beginning of the month, Christopher had a balance of $196 in his checking account. During the next month, he wrote a check for $19, deposited $90, and wrote another check for $180. What was his balance at the end of the month?
A. $87 B. $93 C. -$87 D. -$93
Solve the problem.Two boats leave a dock at the same time. One boat is headed directly east at a constant speed of 35 knots (nautical miles per hour), and the other is headed directly south at a constant speed of 22 knots. Express the distance d between the boats as a function of the time t.
Fill in the blank(s) with the appropriate word(s).
Solve the problem involving a radical equation. Round to the nearest hundredth if necessary.Due to the earth being round, the distance at which a person sees the horizon depends on how high up the person is. The higher the person is above sea level, the farther the horizon is. The height of a person is related to the distance to the horizon by 
where d is the distance in miles and h is the height in feet above sea level. How many feet above sea level must someone climb to see the horizon 4 miles away?
A. 17.44 ft B. 11.11 ft C. 19.2 ft D. 2.4 ft