A ball is thrown into the air. Its height (in feet) t seconds layer is given by h(t)=80t-16t^2. Based on the two equivalent forms of the function h(t)=80t-16t^2=t*(80-16t), A) What is the height of the ball 1 second after it has been thrown? B) After how many seconds does the ball hit the ground? C) At what time(s) is the ball 50 feet above the ground? Help.

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

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Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.