WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER Which functions are increasing?

Select all answers that are correct.

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Write the equation in general quadratic form: plz !