Ocean humpback whales are known to weigh as much as 8 x 104 pounds. the tiny krill they eat weigh only 2.1875 x 103 pounds. how many time greater than krill are humpback whales?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?