Solve the problem.One hundred rats are being trained to run through a maze and are rewarded when they run through it correctly. Once a rat successfully runs the maze, it continues to run the maze correctly in all subsequent trials. The number of rats that run the maze incorrectly after t attempts is given approximately by 
Find the number of trials required such that only 45% of the rats are running the maze incorrectly. Round to the nearest trial.
A. 5 trials
B. 27 trials
C. 6 trials
D. 23 trials
Answer: C
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Solve the problem.A 12-pound puppy is gaining weight at a rate of 
lb per week. How much more time will it take for the puppy's weight to exceed 21
lb?
A. more than 7
week(s)
B. more than 50
weeks
C. more than 14
weeks
D. more than 15
weeks
Find the value of the expression using the given values.
?x = 8
A. 4 B. -8 C. -4 D. 8
Solve the problem.Earth is represented on a map of the solar system so that its surface is a circle with the equation 
A weather satellite circles 0.5 units above the Earth with the center of its circular orbit at the center of the Earth. Find the general form of the equation for the orbit of the satellite on this map.
A. x2 + y2 + 4x + 10y + 28.75 = 0 B. x2 + y2 + 4x + 10y - 35.75 = 0 C. x2 + y2 + 4x + 10y - 4261.25 = 0 D. x2 + y2 - 4x - 10y - 4261.25 = 0
Give the ordered pairs for the points labeled on the graph.
A. A(6, 5); B(-3, 2) B. A(6, 2); B(5, 2) C. A(5, 28); B(2, -3) D. A(6, 5); B(2, -3)