Solve for x, in radians, so that x is within the indicated interval. Give an exact answer.4.2 cos x + 2.1
= 0, [0, ?]
A. 
B. 
C. 
D. 
Answer: B
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Match the given equation with one of the graphs.y2 = 25 - x2
A. 
B. 
C. 
D. 
Write a slope-intercept equation for a line with the given characteristics.Passes through (5, -3) and (-9, 0)
A. y = - 
x - 
B. y = - 
x - 8
C. y = 
x - 8
D. y = 
x - 
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Solve the problem.Three bacteria are placed in a petri dish. The population will double every day. The formula for the number of bacteria in the dish on day t is N(t) = 3(2)t, where t is the number of days after the three bacteria are placed in the dish. How many bacteria are in the dish seven days after the three bacteria are placed in the dish?
A. 147 bacteria B. 12 bacteria C. 384 bacteria D. 42 bacteria