Question

Need help with number 6. Also could you tell me if I did number 5 right? Thanks

Answer 1

check the picture below.

thus


`\bf \stackrel{0}{h}=-16t^2+64\implies 0=-16t^2+64\implies 16t^2=64\implies t^2=\cfrac{64}{16} \\\\\\ t^2=4\implies t=√(4)\implies t=\stackrel{seconds}{2}`

as far as 5, is correct, however


`\bf \textit{using the pythagorean theorem}\\\\ c^2=a^2+b^2\implies c=√(a^2+b^2)\qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ c=√(15^2+8^2)\implies c=√(289)\implies c=17`