When traveling in London, Danny decided to check her e-mail at an internet café. There was a flat charge of $4.5 plus a charge of 22 cents a minute. How many minutes was she logged on if her bill was $11.54?

she was logged on for 32 minutes

Step-by-step explanation:

4.50 + 0.22m = 11.54

4.50 - 4.50 + 0.22m = 11.54 - 4.50

0.22m = 7.04

0.22m/0.22 = 7.04/0.22

M = 32

step-by-step explanation:

b and c

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons