Determine whether the relation represents a function. If it is a function, state the domain and range.
A. function
domain: {Alice, Brad, Carl}
range: {snake, cat, dog}
B. function
domain: {snake, cat, dog}
range: {Alice, Brad, Carl}
C. not a function
Answer: C
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Solve.Jim and Tammi ran a distance of 15,840 feet. A mile is 5280 ft. How many miles did they run?
A. 6 mi B. 3 mi C. 4 mi D. 3 mi 2640 ft
Simplify by writing with positive exponents. Evaluate if necessary. Assume that all variables represent nonzero real numbers.
A. 6t-4
B. 
C. 
D. 6t2
Find the vertex, focus, and directrix of the parabola. Graph the equation.(x + 3)2 = -(y + 2)
A. vertex: (-3, -2)
focus: (-3, -2.25)
directrix: y = -1.75
B. vertex: (-3, -2)
focus: (-3.25, -2)
directrix: x = -2.75
C. vertex: (3, 2)
focus: (3, 1.75)
directrix: y = 2.25
D. vertex: (3, 2)
focus: (2.75, 2)
directrix: x = 3.25
Solve the problem.The population P, in thousands, of Prairie Grove is given by P = 
, where t is the time, in months. Determine the interval on which the population was greater than or equal to 40 thousand.
A. [5.474, ?) B. [0.658, 6.842] C. [0.526, 5.474] D. (-?, ?)