The sales tax for an item was $7.40 and it cost $370 before tax. find the sales tax rate. write your answer as a percentage.
2.3%
Answer:

Step-by-step explanation:
we know that


Let
x ------> new battery life
The equation that represent this situation is

convert to mixed number

Your answer is right
3x^2 + 13x + 4
36/19
=1.894736842 and it keeps going
Hope this helped and have a great day!