Solve the problem.The mass (in g) of gold plate on a dish is increased by electroplating. The mass of gold on the plate is given by m = 115 + 20.0t, where t is the time (in h) of electroplating. For what values of t is m between 133 g and 187 g? Graph the solution.
A. 0.9 < t < 3.6
B. 6.65 < t < 9.35
C. t < 6.65 or t > 9.35
D. t < 0.9 or t > 3.6
Answer: A
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Use the general multiplication rule to find the indicated probability.Two cards are selected without replacement from a standard deck of 52 cards. What is the probability that both cards are the same color (i.e., either both black or both red)?
A. 0.490 B. 0.500 C. 0.245 D. 0.250
Write the augmented matrix for the system.
A. 
B. 
C. 
D. 
Solve the problem.A musician plans to perform 4 selections. In how many ways can she arrange the musical selections?
A. 16 B. 32 C. 12 D. 24
Determine the value of each variable.
+ 
= 
A. a = -9; b = 11; c = -2; d = 6; e = 12; f = -7
B. a = 8; b = 
; c = -40; d = 1; e = -27; f = - 
C. a = 7; b = -5; c = 2; d = 0; e = -12; f = -9
D. a = -7; b = 5; c = -12; d = 0; e = -6; f = 9