A box holds six cards that are numbered 15 through 20. Without replacing the first card, what is the probability that you will choose an even number followed by a prime number? Simplify the ratio, if necessary.

Write 17/20 as a decimal and as a percent.

Give me the equations of two lines that have the same slope but are not parallel.

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