A 120 galbon tank initially 90ib of salt dissolved in 90 gal of water brain containing 2ib/gal of salt flows into the tank at the rate of 4 gal/min and the well stired mixture flows out of the tank at the rate of 3 gal/min how much salt does the tank contain what is full

9. Use Structure Point K is of the way from |(4,-5) to L(0, -7). a. What are the coordinates of Kif n = 4? b. What is a formula for the coordinates of K for any n? Find the probability that a student earns a grade of A,B, or CP= what's the basic oxide |x+4|= -6Multiple choice Evaluate the expression x+yz for x=-3, y=5, and z=2 Use popular sovereignty in a sentence Use the following terms in your own sentences having wh-clause. (5) a) Communicative b) Viva-voce c) Write-up d) T-scale e) Drawing how might the transmission of nerve signals be an example of a positive feedback system Solve the equation z^4+4z^2+16=0 Any two importance of measurement (MC)The Thirteenth Amendment was an extension of the policy begun by which of these? the Compromise of 1850 the Anaconda Plan the Civil Rights Act of 1866 the Emancipation Proclamation 1. Obtain Information Search for and watch anonline video clip that shows the lotus effect.What doyouthink causes this phenomenon? PLEASE HELP!!!!!!!!!!!40 POINTS!!!!!Please write the Experimental and the Null Hypothesis for the following scenerio... August 1, 2013Light that Moves and Molds GelsPitt research team demonstrates gels that can be moved, controlled by lightPITTSBURGHSome animalslike the octopus and cuttlefishtransform their shape based on environment, fending off attackers or threats in the wild. For decades, researchers have worked toward mimicking similar biological responses in non-living organisms, as it would have significant implications in the medical arena. Now, researchers at the University of Pittsburgh have demonstrated such a biomimetic response using hydrogelsa material that constitutes most contact lenses and microfluidic or fluid-controlled technologies. Their study, published in Advanced Functional Materials, is the first to show that these gels can be both reconfigured and controlled by light, undergoing self-sustained motiona uniquely biomimetic behavior.Together with Olga Kuksenok, research associate professor in the Swanson School, Balazs experimented with a newer type of hydrogel containing spirobenzopyran molecules. Such materials had been previously shown to form distinct 2-D patterns on initially flat surfaces when introduced to varying displays of light and are hydrophilic in the dark but become hydrophobic under blue light illumination. Therefore, Balazs and Kuksenok anticipated that light could be a useful stimulus for tailoring the gels shape.Using computer modeling, the Pitt team demonstrated that the gels ran away when exposed to the light, exhibiting direct, sustained motion. The team also factored in heatcombining the light and local variations in temperature to further control the samples motions. Controlling a material with light and temperature could be applicable, Balazs said, in terms of regulating the movement of a microscopic conveyor belt or elevator in a microfluidic device.Experimental Hypothesis: Null Hypothesis: A dog runs 20 m east and then 35 m west in 12 seconds. What is the dog speed? What is the dogs velocity? Q23 In Hindu chronology, the longest time measure is a para. One para equals 311 040 000 000 000 years. Calculate this value in megayears, hours and in seconds. Write your answers in scientific notation. 1. Distinguish between a mixture and a pure substance. The 100th term of the pattern : 5 , 9 ,13 , 17. A regular hexagon is a six sided figure with all sides equal and all six angles equal. Find the length of the sides if the perimeter of the regular hexagon is 396 yd. Question: 5In 2014, what percentage of the world population has access to the Internet?Less than 30%Less than 50%Over 50%Over 80%Please help Rita and Abdul each opened a savings account today. Rita opened her account with a starting amount of $140, and she is going to put in $60 per month. Abdul opened his account with no starting amount, and he is going to put in $80 per month. Let x be the number of months after today