For 50 points.
tim wants to study how air currents affect weather patterns around the earth. during his study, he makes several assumptions based on accepted scientific knowledge, including

-the earth is round;

-warm air rises over cooler air;

-the sun is the main source of energy for many earth processes.

is it acceptable for tim to make these assumptions during his investigation?

a. yes; when performing a scientific investigation, accepted scientific facts can be assumed to be valid.

b. yes; a scientific investigation can be based on any assumptions, as long as they are clearly stated.

c. no; tim must scientifically prove that all of the assumptions are valid as part of his investigation.

d. no; assumptions are never permitted in a scientific investigation.

Every day at coat tech, bill sands down cars and then brian removes the dust. next, loni sprays primer on them, and katie sprays paint and a topcoat on them. finally, lyle dries the cars and polishes them. each person is the best team member at performing the job he or she does. coat tech’s workers have interdependence.

Click on this article and use it to answer the questions below.article on china and controlling the media 1. according to the article, the chinese government has tried to control its people in all of the following ways except: question 1 options: create and spread propaganda in the mediacensorship of the mediaallowing people to create their own social mediadeleting people's social media posts without their permission

30 points in a citizens elect the president as head of government separately from the legislature. question 1 options: parliamentary democracy communist state presidential democracy autocratic state question 2 (1 point) this form of government has only a single political party. question 2 options: communist democratic autocratic parliamentary question 3 (1 point) this is a government controlled by one person with absolute power. question 3 options: communist democratic autocratic parliamentary question 4 (1 point) a government is a government system where all citizens that choose to vote have a say in their government. question 4 options: communist democratic autocratic theocracy question 5 (1 point) in a the people elect the legislature, and the legislature chooses the head of government. question 5 options: parliamentary democracy communist state presidential democracy autocratic state