Agift store owner used 9 rolls of wrapping paper to wrap his customers' gifts last week.
each roll was 66.5 in. long. how many gifts did he wrap if a 9.5 in. long piece of wrapping
paper was used to wrap each gift?

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

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.

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x