Exercise 2.10. Math and physics. In a class of 100 people, 60 of them are math majors, and 75 of them are physics majors. There are no students majoring in anything else in this class. This means that some of the students are double-majoring in both math and physics. A student is picked at random. What is the probability the student is double-majoring

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

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