La salinidad del océano se refiere a la cantidad de material disuelto encontrado en una muestra de agua de mar. La salinidad S se puede estimar a partir de la cantidad C de cloruro en agua de mar usando S=0.03+1.805C, donde S y C son medidos por peso en partes por mil. Aproxime C si S es 0.35.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0