Which number would be an element of the set of integers but not an element of the set of whole numbers,0, -3, 5, -1/2?

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h

Math question.. plz me .. best answer all

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?