A ball is thrown from an initial height of 5 feet with an initial upward velocity of 21ft/s. The ball's height h (in feet) after t seconds is given by the following. h=5+21t-16t^2
Find all values of t for which the ball's height is 11 feet.

For a school newspaper article, cienna conducted a survey to find out students’ favorite subjects. she polled all the students in mrs. lopez’s advanced dance class. why is her data likely to be skewed? honors dance students are more likely to enjoy dance than students in the general population, so dance may be overrepresented. cienna should have interviewed all the students in the school to get more accurate data. honors dance students are more likely to enjoy dance than students in the general population, so dance will be underrepresented. cienna should have interviewed only every other student in the class to avoid having too many people.

Divide: 1573 ÷ 7 = a) 222 r5 b) 223 r6 c) 224 r5 d) 224 r3

Which of the choices shown could be used to prove that aacp=abcp ?