A country has 20 parks that allow camping and 147 parks that have playground. Of those, 19 parks both allow camping and have play grounds. The country has a total of 342 parks.

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Which zero pair could be added to the function f(x) = x2 + 12x + 6 so that the function can be written in vertex form? o 3, -3o 6,629,-936, 36