Find the numerical value of the rational expression for the given value of r.
, r = -4
A. 
B. - 
C. - 
D. - 
Answer: B
Mathematics
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In an adiabatic process (one in which no heat transfer takes place), the pressure P and volume V of an ideal gas such as oxygen satisfy the equation 
where C is a constant. Suppose that at a certain instant of time, the volume of the gas is 2L, the pressure is 100 kPa, and the pressure is decreasing at the rate of 5 kPa/sec. Find the rate at which the volume is changing.
What will be an ideal response?
Mathematics
Solve the problem.If y varies directly as x, and y = 3 when x = 4, find y when x = 28.
A. 
B. 21
C. 
D. 
Mathematics
Determine whether the sequence is arithmetic.2, -3, -8, -13, -18, ...
A. Arithmetic B. Not arithmetic
Mathematics
Express the number in terms of i.
A. 2
i
B. -3
i
C. 3
i
D. 6i
Mathematics