709
82
Around 80$ to 82$
80/82 = 40/41
About 82$....plus tax
Pb2+ has lost two electrons, so it has 82 - 2 = 80 electrons.
82 + 82 = 164
80
80
It is: 80+2 = 82
82 to the nearest tens = 80
80 assuming it is rounded to nearest ten (as question does not say) 82 is 2 away from 80 82 is 8 away from 90 2 is smaller than 8 so answer is 80
69 + 78 + 82 = 229