Aroofer measures a run of 4 feet for each 2 feet of rise on a roof. what is the pitch, or slope, of the roof

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

How do you write something in scientific notation?