Determine the domain and range of the function. State whether the function is a function or not a function. 
A. domain: {1, 3, 2}
range: {11, 4, 7, 1}
not a function
B. domain: {11, 4, 7, 1}
range: {1, 3, 2}
not a function
C. domain: {1, 3, 2}
range: {11, 4, 7, 1}
function
D. domain: {11, 4, 7, 1}
range: {1, 3, 2}
function
Answer: A
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Solve the problem. Round your answer, if appropriate.The volume of a rectangular box with a square base remains constant at 600 cm3 as the area of the base increases at a rate of 8 
2/sec. Find the rate at which the height of the box is decreasing when each side of the base is 18 cm long. (Do not round your answer.)
A. 
cm/sec
B. 
cm/sec
C. 
cm/sec
D. 
cm/sec
Determine an expression for the instantaneous velocity of an object moving with rectilinear motion according to the function given, if s represents displacement in terms of time.s = 10 - 8t2 + 5t3
A. 15t2 - 16t + 1 B. 15t2 - 16t C. 15t - 16 D. 15t - 15
Solve.The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is 
(kiloPascals) when the number of moles is 7, the temperature is 
, and the volume is 
, find the pressure when the number of moles is 8, the temperature is 
, and the volume
is 
.
A. 660
B. 750
C. 1680
D. 1500
Solve the systems of equations by the addition method. 
A. {(2, 7)}
B. no solution; ?
C. {(3, 2)}
D. 