A June 2015 survey investigated the ownership of tablet computers by US adults. A random sample of 959 people were surveyed; 197 of the 455 men in the sample owned a tablet and 235 of the 504 women in the sample owned a tablet. Tiffany wants to test whether the survey results provide evidence of a difference in the proportion of US men and US women who owned a tablet in 2015

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?