Find the x-intercepts of the graph of each equation.y = 25x2 + 40x + 12
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Answer: B
Mathematics
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Solve the problem.The ceiling height of a room is 10 feet. The width of the floor is 9 feet and the length is 3 feet. How much airspace is in the room?
A. 270 ft3 B. 27 ft3 C. 90 ft3 D. 30 ft3
Mathematics
Evaluate the given expression.
A. 
B. 
C. 15
D. 
Mathematics
Solve the problem.Between 7:00 AM and 8:00 AM, trains arrive at a subway station at a rate of 10 trains per hour 
per minute). The following formula from statistics can be used to determine the probability that a train will arrive within t minutes of 7:00 AM. F(t) = 1 - e-0.17tDetermine how many minutes are needed for the probability to reach 80%.
A. 9.47 min B. 4.73 min C. 6.98 min D. 1.09 min
Mathematics
Simplify.
÷ 
? (
÷ 9) ÷ (8 - 9)
A. 0 B. 4 C. undefined D. 1
Mathematics