Explain how bar graphs can show comparisons between 2 topics.

Which of the following is necessary to build a skyscraper? a. wooden beams b. metal beams c. plastic supports d. all of the above

Select the correct answer. what are the two types of lighting? a. dark and light b. key and fill c. gobos and snoots d. incident and reflected e. polarizing and optical

Identify the expression 8 + 8 + 8 + 8 as a numerical expression or a variable expression. for a variable expression, name the variable.