Question 1136217
.
<pre>
(a)  h(2) = {{{-16*2^2 + 47*2 +3}}} = 33 ft.     <U>ANSWER</U>


(b)  Solve the equation

     h(t) = 0, which is  {{{-16*t^2 + 47t + 3}}} = 0.


     {{{t[1,2]}}} = {{{(-47 +- sqrt((-47)^2 -4*(-16)*3))/(-32)}}} = {{{(-47 +- 49)/(-32)}}}.


    Use the positive root  t = {{{(47 + 49)/32}}} = 3 seconds.    <U>ANSWER</U>
</pre>

Answered and solved.


---------------------


For completeness, see my previous post


<A HREF=https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1136213.html>https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1136213.html</A>


https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1136213.html