A group of scientists wants to observe the adaptation of a foreign fish species in a river ecosystem. To do this, they want to enclose the top and sides of a section of a river to block light and matter from entering the area. Evaluate whether this experimental system is an isolated system. Justify your answer based on the definition of an isolated system.

State the x- and y-intercepts of each equation y= -2x + 7 Find the area of each figure. Round to the nearest tenth if necessary. nobody is writing this essay into passive voice Why was England able to transition from agriculture to industry?A. wealthy landowners owned both the land and the big businesses B. industries had all the factors of production needed to produce goods and services C. small farmers willingly gave up their farmland for industrial development D. the government was in complete control of economic development What is the sum? Complete the equation.-5 + (20) A hiker has 2 pairs of hiking shoes, 3 shirts, and 5 pairs of shorts to choose from. How does the number of combinations of shoes, shirts, and shorts change as thehiker adds a new pair of shorts to his collection? Explain.If the hiker addsnew pair of shorts to his collection, the new number of combinations iswhich isthanThe original number of combinations isthe original number of combinations.(Type whole numbers.) In Earths atmosphere, the speed of sound can be approximated using partial variation. The speed of sound is approximately 331 m/s at 0C and approximately 343 m/s at 20C.Jenny yells out Hello in a canyon when the airtemperature is 10C. It takes 1.4 s to hear herecho. How far away is the wall of the canyon? ASAP WHATS THE THEME- will mark brianist What was the Truman Doctrine?Question 1 options:Doctrine established by President Truman to secretly turn the US into a communist country.Doctrine established by President Truman to stop the spread of communism to other countries.Doctrine established by President Truman to send troops to all nations to help set up a democracy.Doctrine established by President Truman to invade communist countries. Question 2 (1 point)The purpose of the Berlin Wall was to separte East and West German for the purpose of allowing a Communist government to control East Germany while a capitalist form of government controlled the West side of Germany.Question 2 options: True FalseQuestion 3 (1 point)Which best describes the Cuban Missle Crisis?Question 3 options:A war in which the US launched missiles against Cuba and this angered the SovietsA war in which the Soviets launched missiles against US and this angered the SovietsThe people of Cuba started secretely manufactoring missles to be launched towards the US.The Soviets placed missiles in Cuba as a threat to the US.Question 4 (1 point)Which statement is true about the Korean Conflict?Question 4 options:Korea was divided into North and South Korean. The North was ruled by Communist. The South was capitalist. The US supported the North. The Soviets supported the South. Korea was divided into North and South Korean. The North was ruled by Communist. The South was capitalist. The Soviets supported the North. The US supported the South. Korea went to war with both the US and the Soviet Union in order to establish a communist nation. The Soviet Union tried to overtake all of Korea, so the US declared war and stopped them.Question 5 (1 point)Which best describes the Vietnam Conflict?Question 5 options:Vietnam was divided into North (Communists) and South (capitalist) after WWII. The Soviets and China supported the South. US helped the North. Once war was declared, it was a very short war.Vietnam declared war on the Soviet Union in order to stop the spread of communism to thier country. The US stepped in and stopped them.Vietnam was divided into North (Communists) and South (capitalist) after WWII. The Soviets and China supported the North. US helped the South. War was never declared, but the conflict was very costly, both monetarily and with human lives.Vietnam was a small coutry everyone was afraid of. The US invaded the country because they were afraid they were going to do what Hitler had done in Germany. I need help! :) +no links please and thank you! 1. Which of the following sentences uses a dash correctly?A. Your dog would rather watch squirrels play outside than play outside himself.B. She needs - more coffee mugs - to complete her collection,C. Last year, when I went skiing - for the very first time I fell and broke an ankle.D. He likes to assemble wooden puzzles, especially - three-dimensional puzzles. What is Astroturfing? Please define and describe the term. Do you agree or disagree with the assertion that 20 40% of all online reviews are fake? where can I find solved problems of advanced soil structure interaction? Give the coordinates of point D.A. (-2,-4)B. (-4,2)C. (-4,-2)D. (4, -2) An observer notices that 12 waves pass by in 4 seconds. What is the frequency of these waves? 0.33 Hz 16 Hz 48 Hz 3 Hz 1. What is the slope of the line through the points (-4, 2) and (16,-6) PLEASE HELP 5) A bag contains eight redmarbles and six bluemarbles. You randomly picka marble and return it to thebag before picking anothermarble. What is theprobabilty that the firstmarble you picked was blueand the second marble wasred? Record your answer asa decimal to thethousandths place (threeplaces past the decimal). 1 4/7 as an improper fraction. A company analyzed how inventory was affected during the first five hours after a commercial aired for its product. The relationship is shown on the graph below.What happens to inventory as each hour passes? A. The inventory decreases by 20 units. B. The inventory decreases by 10 units. C. The inventory decreases by 5 units. D. The inventory decreases by 1 unit. What do students learn about self esteem?