Solve the equation.log 4x = log 3 + log (x + 3)
A. -9
B. 9
C. 
D. 2
Answer: B
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Sketch the given surface.x2 + y2 = 9
What will be an ideal response?
Use logarithmic differentiation to find the derivative of y.y = x(x - 7)(x - 1)
A. 1
B. x(x - 7)(x - 1)(lnx + ln(x - 7) + ln(x - 1))
C. 
+ 
+ 
D. x(x - 7)(x - 1)
Solve the problem.A 5.6-ft fence is 12.818 ft away from a plant in the direction of the sun. It is observed that the shadow of the fence extends exactly to the bottom of the plant. (See drawing) Find ?, the angle of elevation of the sun at that time. Round the measure of the angle to the nearest tenth of a degree when necessary.
A. ? = 23.4° B. ? = 23.6° C. ? = 25° D. ? = 23.8°
Solve the problem. Round to one decimal place if needed.If a flagpole 15 feet tall casts a shadow that is 20 feet long, find the length of the shadow cast by an antenna which is 45 feet tall.
A. 33.8 ft B. 60 ft C. 50 ft D. 6.7 ft