What is the area of OB to the nearest
tenth? (Use 3.14 for Tr.)

so the right answer is of option A.

Look at the attached picture⤴

Hope this will help u...:)

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.