Simplify.[8 + (-4)]2
A. 80
B. 48
C. 16
D. 144
Answer: C
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Find the product.(r - 11)2
A. r2 - 22r + 121 B. r + 121 C. r2 + 121 D. 121r2 - 22r + 121
Solve the problem.A thermometer reading 
is placed inside a cold storage room with a constant temperature of 
If the thermometer reads 
in 8 minutes, how long before it reaches 
Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to the nearest whole minute.)
A. 72 minutes B. -5 minutes C. 24 minutes D. -29 minutes
Evaluate the expression.
A. 10 B. 25 C. 8 D. 15
Use the two-stage method to solve.Find x1 ? 0 and x2 ? 0 such that x1 + 2x2 ? 24 x1 + x2 ? 40and z = 6x1 + 5x2 is maximized.
A. x1 = 30, x2 = 10, z = 230 B. x1 = 20, x2 = 20, z = 220 C. x2 = 40, x1 = 0, z = 200 D. x1 = 40, x2 = 0, z = 240