A function for which each element in the codomain Y is the image of at most one element in the domain X and each element in the codomain Y is the image of at least one element in the domain.

a. One-to-one
b. One way
c. Onto
d. Bijection
e. Non of them

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

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.

Find the area of an equilateral triangle with a side of 6 inches