The tip is $15.73. I get that by multiplying 78.63 and .20. then you add the tip to the bill and get $94.36. you then find the discount by multiplying 94.36 and .15. the discount is 14.15. then subtract 14.15 from 94.36 to get your total.
the answer is $80.21
Answer:
A
Step-by-step explanation:
they are complementary, they add to 90
5% of 15 is 0.75
15 - 0.75 = 14.25
So it the sale price $14.25 ?
Keep in mind that "ln" is just a shortcut for the logarithm with a base of "e".