What is the domain of the given function?

a) {x  |  x  =  –6,  –1, 0, 3}

b) {y  |  y  =  –7,  –2, 1, 9}

c) {x  |  x  =  –7,  –6,  –2,  –1, 0, 1, 3, 9}

d) {y  |  y  =  –7,  –6,  –2,  –1, 0, 1, 3, 9}

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)