PLEASE HELP!! What is the domain of the function {( −2, 1), ( −1, 3), (0, 2), (1, 0)}?

A. {0, 1}
B. {0, 1, 2, 3}
C. {−2, −1, 0, 1}
D. {−2, −1, 0, 1, 2, 3}

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?