a student cost for last semester at her community college was $2200. She spent $308 of that on books. whats % of last semesters college costs was spent on books

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

The anwser cause i do not understand just plez

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.