Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.3x - 10y - 9z = -4 and- 4x + 4y - 10z = -6
A. 0.242 rad
B. 1.169 rad
C. 1.470 rad
D. 1.328 rad
Answer: D
Mathematics
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Find the sum of the n terms of the indicated geometric sequence with the given values.a1 = 
, r = 
, n = 5
A. 
B. 
C. 341
D. 
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Determine whether the function is a solution of the wave equation.w(x, t) = e5ct cos 5x
A. Yes B. No
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Graph the line.-7y - x = -8
A. 
B. 
C. 
D. 
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