Solve the problem. Snell's Law states that 
Use this law to find the requested value. If 
and 
find 
A. c1 = 3 × 108
B. c1 = 2.67 × 108
C. c1 = 2.1 × 1010
D. c1 = 1.98 × 107
Answer: A
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Solve the problem.A sports shop sells tennis rackets in 4 different weights, 2 types of string, and 3 grip sizes. How many different rackets could they sell?
A. 9 B. 24 C. 18 D. 32
Find all the first order partial derivatives for the following function.f(x,y,z) = xe(x2 + y2 + z2)
A. 
= 2x2e(x2 + y2 + z2); 
= xye(x2 + y2 + z2); 
= 2xze(x2 + y2 + z2)
B. 
= (1 + 2x2) e(x2 + y2 + z2); 
= xe(x2 + y2 + z2); 
= xe(x2 + y2 + z2)
C. 
= (1 + 2x2) e(x2 + y2 + z2); 
= xy2e(x2 + y2 + z2); 
= xz2e(x2 + y2 + z2)
D. 
= (1 + 2x2) e(x2 + y2 + z2); 
= 2xye(x2 + y2 + z2); 
= 2xze(x2 + y2 + z2)
Express the sum using summation notation.3 + 6 + 9 + ... + 21
A. 
B. 
C. 
D. 
Convert.58 mm = ___ m
A. 5800 B. 0.58 C. 0.058 D. 58,000