The function f(x) = 1.50x + 12.50 relates how much Katie pays for digital streaming service, f(x), to the number of movies, x, she streams in a month. What is the value and meaning of f(18)?

How do i multiply two digit numbers

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?