Answer:
D
Step-by-step explanation:
Discount = 35% of 220
![= \dfrac{35}{100}*220\\\\= 7 * 11](https://tex.z-dn.net/?f=%3D%20%5Cdfrac%7B35%7D%7B100%7D%2A220%5C%5C%5C%5C%3D%207%20%2A%2011)
= $ 77
Amount saved =$ 77
Answer: charging in premiums in exchange for insurance coverage???
Step-by-step explanation:
Answer:
True
Step-by-step explanation:
Answer:
6.5 seconds
Step-by-step explanation:
Keep in mind that when
, this is the same height for both when the model rocket takes off and lands, so when the rocket lands, time is positive. Thus:
![h=-4t^2+24t+13\\\\0=-4t^2+24t+13\\\\t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\ \\t=\frac{-24\pm\sqrt{24^2-4(-4)(13)}}{2(-4)}\\ \\t=\frac{-24\pm\sqrt{576+208}}{-8}\\\\t=\frac{-24\pm\sqrt{576+208}}{-8}\\\\t=\frac{-24\pm\sqrt{784}}{-8}\\\\t=\frac{-24\pm28}{-8}\\\\t=\frac{-24-28}{-8}\\ \\t=\frac{-52}{-8}\\ \\t=\frac{52}{8}\\\\t=6.5](https://tex.z-dn.net/?f=h%3D-4t%5E2%2B24t%2B13%5C%5C%5C%5C0%3D-4t%5E2%2B24t%2B13%5C%5C%5C%5Ct%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D%5C%5C%20%5C%5Ct%3D%5Cfrac%7B-24%5Cpm%5Csqrt%7B24%5E2-4%28-4%29%2813%29%7D%7D%7B2%28-4%29%7D%5C%5C%20%5C%5Ct%3D%5Cfrac%7B-24%5Cpm%5Csqrt%7B576%2B208%7D%7D%7B-8%7D%5C%5C%5C%5Ct%3D%5Cfrac%7B-24%5Cpm%5Csqrt%7B576%2B208%7D%7D%7B-8%7D%5C%5C%5C%5Ct%3D%5Cfrac%7B-24%5Cpm%5Csqrt%7B784%7D%7D%7B-8%7D%5C%5C%5C%5Ct%3D%5Cfrac%7B-24%5Cpm28%7D%7B-8%7D%5C%5C%5C%5Ct%3D%5Cfrac%7B-24-28%7D%7B-8%7D%5C%5C%20%5C%5Ct%3D%5Cfrac%7B-52%7D%7B-8%7D%5C%5C%20%5C%5Ct%3D%5Cfrac%7B52%7D%7B8%7D%5C%5C%5C%5Ct%3D6.5)
So, the amount of seconds that the model rocket stayed above the ground since it left the platform is 6.5 seconds