Find the length of the curve.x = 2t, y = 
t 3/2, 0 ? t ? 21
A. 39
B. 
C. 82
D. 78
Answer: D
Mathematics
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Provide an appropriate response.A belt to form a conveyor system connects two 15-cm.-diameter drums. The centers of the drums are 5 m apart. How long must a replacement belt be? Round to the nearest tenth.
A. 104.2 cm B. 40.0 cm C. 52.1 cm D. 57.1 cm
Mathematics
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Mathematics
Perform the indicated operation. Write the answer in simplest form.3
? 3
A. 12 B. 9 C. 7 D. 11
Mathematics
Find the vertices and the foci of the given ellipse.
+ 
= 1
A. V: (0, 25), (16, 0); F: (0, 5), (4, 0) B. V: (0, -5), (0, 5); F: (0, - 3) and (0, 3) C. V: (0, -25), (0, 25); F: (0, -5), (0, 5) D. V: (-5, 0), (5, 0) F: (- 3, 0), (3, 0)
Mathematics