An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255
Answer:
the answer is c and d
Explanation:
i Just got it by making predictions but c and d are right
Answer:
mass number
Explanation:
The sum of the protons and neutrons in an atom equals the mass number of such an atom.
- Mass number is the mass of an atom.
- The mass of an atom is concentrated in the nucleus
- The particles in the nucleus are the protons and neutrons.
So;
Mass number = number of protons + number of neutrons.
