If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.? = 4 radians, A = 54 square meters, r = ?
A. 432 m
B. 108 m
C. 10.39 m
D. 5.2 m
Answer: D
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.
Find the velocity vector of the particle.
A. v(t) = (-8)i + 
j
B. v(t) = 
i + (-8t)j
C. v(t) = (-8t)i - 
j
D. v(t) = (-8t)i + 
j
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Refer to the figure to classify the statement as true or false.
and 
are coplanar lines.
A. True B. False
Mathematics
Solve the equation.d - 3 = -19
A. 22 B. 16 C. -16 D. -22
Mathematics
Use a calculator to find the value of the expression rounded to two decimal places.tan-1 (1.5)
A. 0.98 B. 0.59 C. 56.31 D. 33.69
Mathematics