I only need number 11 in the picture please help and show work

What is the most accurate measurement of 1 pound

Write the converse of the following statement: if the trees have no leaves, then it is fall. if the trees have no leaves, then it is fall. the trees have no leaves, therefore it is fall. it is fall since the trees have no leaves. if it is fall, then the trees have no leaves.

What is the exact volume of the cylinder (radius 13 in., height 30 in.)