This question has several parts that must be completed…

Question Answered step-by-step This question has several parts that must be completed… This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part.A rock is thrown downward, and the distance D, in feet, that it falls in t seconds is given by D = 16t2 + 3t. Exercise (a)Find how long it takes for the rock to fall 230 feet by using the quadratic formula.Step 1To find when the rock has fallen 230 feet we need to solve the equation 16t2 + 3t =  . The quadratic formula tells us that the solution of at2 + bt + c = 0 ist = ?b ±  b2 ? 4ac2a. The first step is to subtract 230 from each side to get16t2 + 3t ? 230 =   Find how long it takes for the rock to fall 230 feet by using the crossing-graphs method.Step 1To find when the rock has fallen 230 feet we need to solve the equation 16t2 + 3t =  . We use the crossing graphs method to get the solution.In the figure below we have graphed D = 16t2 + 3t and the constant 230 using a horizontal span of 0 to 10 and a vertical span of 0 to 600. The horizontal axis corresponds to the variable,  —Select— t D , which is seconds, and the vertical axis corresponds to the variable,  —Select— t D , which is distance fallen.We see that the intersection occurs at t =  . Thus, it takes the rock  seconds to fall 230 feet.            Math MATH MISC Share QuestionEmailCopy link Comments (0)