Pls help pls pls question 6 please help (with protractor or if u can do it urself)

Which statement justifies why angle ebc measures 90?

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.

Write a function rule for the table