The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific a) fact. b) hypothesis. c) law or principle. d) theory. e) none of these.

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4