Use the equation $u t-16 t^{2}=0$, where v=velocity in feet per second and t=time in seconds. A rocket at a fireworks display was launched with the initial velocity of 208 ft/sec. How many seconds was it in the air before it splashed down in the lake?

Calculate the midpoint of the segment with the given endpoints. $E(4,-7), F(-2,3)$

Solve the following equation.

$\frac{y+4}{y-2}+\frac{6}{y-2}=\frac{1}{y+3}$

Solve each equation. Check your solution. $\sqrt{6 a-6}=a+1$

Solve each equation. State the number and type of roots. $8 x^{3}-27=0$

Find the value of c that makes each trinomial a perfect square. Then write the trinomialas a perfect square. $x^{2}-13 x+c$

Find the distance between points with the given coordinates. $(-5,2),(4,-2)$

Complete parts a-c for each quadratic equation. a. Find the value of the discriminant. b. Describe the number and type of roots. c. Find the exact solutions by using the Quadratic Formula. $4 x^{2}-6 x+2=0$

Simplify. $\sqrt{-225}$

If $f(x)=a x^{2}+b x+c$ is a quadratic function, can a=0?

Use the equation $u t-16 t^{2}=0$, where v=velocity in feet per second and t=time in seconds. How long will a football kicked with an initial velocity of 96 ft/sec remain in the air?

Find the coordinates of the midpoint of the segment with the given endpoints. $G(-13,9), H(7,-11)$

Simplify. $(-3 i)(-7 i)(2 i)$

Solve each equation by using the Square Root Property. Round to the nearest hundredth if necessary. $x^{2}+32 x+256=1$