Courtney drives for 30 minutes at 50 mph
and for 1 hour at 40 mph. how far has he
traveled altogether?

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as