155 students are going on a field trip. each bus can carry 42 students. if every bus except the last one carry's as many students as possible, how many students will he last bus carry

Don't know how to find x given these segment lengths

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

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