A company that makes hair-care products had 7,000 people try a new shampoo. Of the 7,000 people, 21 had a mild allergic reaction. What percent of the people had a mild allergic reaction? (Decimal form)

5.(04.07) two different plants grow each year at different rates, which are represented by the functions f(x) = 4* and g(x) = 5x + 2. what is the first year the f(x) height is greater than the g(x) height? year 3 year 0 year 2 year 1

Can someone me and do the problem plz so i can understand it more better

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers