The common logarithm of a number, N, is the a. power to which N must be raised to equal 10.
b. power to which 10 must be raised to equal N.
c. square root of N.
d. inverse of N.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

the objects have the same charge is correct.

nathan lee