If the first term of an A. P is 67 and the common difference is Then, the sum of the first 20 terms is .

David, an aspiring baseball player, was struck on the left side of his face with a fastball pitch. he was not wearing a safety helmet. his zygomatic arch was crushed, as well as parts of the temporal bone. following the accident and reconstructive surgery, he noted that his left lower eyelid was still drooping and the corner of his mouth sagged. what nerve damage did he sustain?

Early treatment for mental illness involved because doctors believed that doing this would drain the mental illness out of the person’s body.

Which many - celled organisms are capable of causing diseases in humans