Students at a middle school signed up for community service options. One half of the students signed up to paint houses, One-fifth signed up for gardening, and Three-tenths signed up to visit a nursing home. Which statement is true?

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Can someone tell me if this is perpendicular? !