Answer:
4.806 g ≤ n ≤ 5.194 where n is the mass of a nickle.
Step-by-step explanation:
The problem tells us the weight can vary by .194 g, this means it can be up to .194 lighter and 194 heavier. Well what value is .194 lighter and .194 heavier? 4.806 and 5.194 respectively. So that means a nickle can be anywhere in that range, which tells us the inequality.
He gave away 9 (20 x (3/7) =9) so 21-9=12
13-5 is how you would do this so your answer would be 8 :)
They’re all -4 ,, what exactly are you asking ?
