Solve the equation.
= 2
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem using the quadratic formula.When water runs out of a hole in a cylindrical container, the height of the water in the container can often be modeled by a quadratic function. Assume that the height of the water in a particular metal can with a small hole can be modeled by h = 0.0005x2 - 0.15x + 8, where x is the time (sec) and h is the height (cm). Use the quadratic formula to estimate the time when the height is 6 cm. Round your answer to the nearest second.
A. 21 sec B. 20 sec C. 18 sec D. 14 sec
Mathematics
Multiply.(6i)(-4i)
A. 10 B. -24 C. -10 D. 24
Mathematics
Find the sum of the series.
A. 80 B. 16 C. -80 D. 4096
Mathematics
Find the value of the expression.7[32 + 6(5 + 6)]
A. 87 B. 525 C. 1155 D. 315
Mathematics