Janet is writing a research paper about the use of radiation in cancer
treatment. she has located a source she wants to use: an article published in
a peer-reviewed journal focused on cancer research, written by david sparks,
m. d. in 1976. why might this source not be credible?
o
a. its information may be out of date.
b. it was not written by a researcher.
o
c. its findings have not been verified.
d. it is not likely to be unbiased.
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Which of these sentences has an error in subject-verb agreement? a. official procedures calls for students who are tardy three times to serve detention. b. as a result of her efforts, a team of volunteers signs up every month to clean the city's parks. c. the committee of parents protested loudly at the school board meeting. d. each of the neighbors brings a dish to share at the pot-luck gathering.

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

What kind of words would be to find the information from a database about changes in height of an ocean surface over a 20 year period