Awell-insulated house should have insulation with an r-value of at least r-19 in the walls
and an r-value of r-30 to r-44 in the ceilings. why is a higher r-value needed in the ceilings?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Patricia is trying to compare the average rainfall of new york to that of arizona. a comparison between these two states for the months of july through september would best be measured in

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.