Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 11, 
= 7, ? = 43°
Find 
A. -200.3
B. 17.8
C. 9.6
D. 23.3
Answer: C
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Use the properties of summation notation to find the sum.
A. - 175 B. 145 C. - 145 D. - 163
Solve.An isosceles right triangle has legs of equal length. If the hypotenuse is 18 inches long, find the length of each leg.
A. 81
in.
B. 9
in.
C. 18
in.
D. 
in.
Write in decimal notation.7.786 × 104
A. 7786 B. 778,600 C. 311.44 D. 77,860
For the parametric equations given, use a graphing calculator to generate the curve over the stated interval for the parameter t. Use the window specified. Also, find a rectangular equation for the curve.x = 2t, y = t + 5, for t in [-2, 3]
A. 
The rectangular equation for the curve is
y = x2 + 1, for x in [-2, 2].
B. 
The rectangular equation for the curve is
y = 
x + 5, for x in [-4, 6].
C. 
The rectangular equation for the curve is
y = 
x - 5, for x in [-4, 6].
D. 
The rectangular equation for the curve is
y = -2x + 5, for x in [-6,4].