If s denotes the length of the arc of a circle of radius r subtended by a central angle ?, find the missing quantity.r = 
feet, s = 8 feet, ? = ?
A. 
°
B. 20 radians
C. 20°
D. 
radians
Answer: B
Mathematics
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Find the area or volume.Find the area of the region bounded by the curve y = 5x-2, the x-axis, and on the left by x = 1.
A. 
B. 5
C. 10
D. 25
Mathematics
Provide an appropriate response.Factor the special product: 9a2 - 49
A. (3a - 7)2 B. (3a + 7)2 C. (3a + 7)(3a - 7) D. (3a - 7)(3a - 7)
Mathematics
Simplify.(2xy)3(3x4y9)2
A. 6x5y21 B. 72x9y14 C. 72x11y21 D. 6x11y21
Mathematics
Find the equilibrium values for B and F .
Chemicals enter a house’s basement air. Let F (t ) and B(t ) be the amount of chemical (in mg m3 ) in the first floor air and the basement air after t minutes, respectively. Let’s suppose that the rate of change of F and B are given by the equations: B'= -0.017B + 0.85 and F' = 0.015B - 0.0125F
Mathematics