Use a formula for perimeter or area to solve the problem.The width of a room is 7 feet, and the area of the room is 98 square feet. Find the room's length.
A. 686 feet
B. 91 feet
C. 14 feet
D. 42 feet
Answer: C
Mathematics
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Find the unit tangent vector of the given curve.r(t) = 
i + 
j - 12tk
A. T = 
i + 
j - 
k
B. T = 
i + 
j - 
k
C. T = 
i + 
j - 
k
D. T = 
i + 
j - 
k
Mathematics
Find the zero of the linear function.g(x) = 8x + 72
A. 64 B. -64 C. 9 D. -9
Mathematics
Solve the problem.Let 
be the cost to manufacture x items. Find the average cost per item to produce 30 items.
A. $1330 B. $227 C. $87 D. $244
Mathematics
Use the formula d = rt to find the value of the missing variable.t = 210 sec, r = 10 feet per second
A. d = 2100 ft
B. d = 21 ft
C. d = 
ft
D. d= 21,000 ft
Mathematics