The histogram shows the number of hours volunteers worked one week. what percent of the volunteers worked 8 to 11 hours or 16 to 19 hours?

True or false? a circle could be circumscribed about the quadrilateral below.

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?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap