An atom's mass is determined by the number of and in the atom's nucleus. a
protons, neutrons
b
electrons , protons
c
protons, electrons
d
electrons , neutrons

a

protons, neutrons

Step-by-step explanation:

An atom's mass is determined by the number of protons and neutrons in the atom's nucleus.

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1

30 people weigh 160 pounds or more