Find the value of the expression.
A. - 
B. 
C. 
D. - 
Answer: B
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Solve the problem.A rescue cable attached to a helicopter weighs 2 lb/ft. A 190-lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done in lifting the man if the helicopter is 50 ft above the water?
A. 14,500 ft ? lb B. 9600 ft ? lb C. 12,000 ft ? lb D. 2690 ft ? lb
Determine whether the graph is that of a function. If it is, use the graph to find its domain and range, the intercepts, if any, and any symmetry with respect to the x-axis, the y-axis, or the origin.
A. function domain: {x|-9 ? x ? 9} range: {y|-9 ? y ? 9} intercepts: (-9, 0), (0, -9), (0, 9), (9, 0) symmetry: x-axis, y-axis B. function domain: {x|-9 ? x ? 9} range: {y|-9 ? y ? 9} intercepts: (-9, 0), (0, -9), (0, 0), (0, 9), (9, 0) symmetry: origin C. function domain: {x|-9 ? x ? 9} range: {y|-9 ? y ? 9} intercepts: (-9, 0), (0, -9), (0, 9), (9, 0) symmetry: x-axis, y-axis, origin D. not a function
Find the center, foci, and vertices of the ellipse.64x2 + 36y2 = 2304
A. center at (0, 0)
foci at (- 2
, 0) and (2
, 0)
vertices at (-8, 0), (8, 0)
B. center at (0, 0)
foci at (0, -8) and (0, 8)
vertices at (0, -64), (0, 64)
C. center at (0, 0)
foci at (0, - 2
) and (0, 2
)
vertices at (0, -8), (0, 8)
D. center at (0, 0)
foci at (0, 8) and (6, 0)
vertices at (0, 64) and (36, 0)
Use the given information given to find the exact value of the trigonometric function.sec ? = 4,
? lies in quadrant I
Find cos 
.
A. 
B. 
C. 
D. 