b^2-4ac<0 b^2-144<0 (b-12)(b+12)<0
-12<b<12
The function we have to use in this case is
![m(t)=m_o\cdot(1+\frac{0.03}{4})^{4t}](https://tex.z-dn.net/?f=m%28t%29%3Dm_o%5Ccdot%281%2B%5Cfrac%7B0.03%7D%7B4%7D%29%5E%7B4t%7D)
where mo is the initial amount of money. After 2 teats we get that
![\begin{gathered} m_0\cdot(1+\frac{0.03}{4})^8=800 \\ m_0\cdot1.06=800 \\ m_0=\frac{800}{1.06}\approx754.71 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20m_0%5Ccdot%281%2B%5Cfrac%7B0.03%7D%7B4%7D%29%5E8%3D800%20%5C%5C%20m_0%5Ccdot1.06%3D800%20%5C%5C%20m_0%3D%5Cfrac%7B800%7D%7B1.06%7D%5Capprox754.71%20%5Cend%7Bgathered%7D)
SO he earned 755 approximately
Answer:
BC=54, DE=27
Step-by-step explanation:
(7x-1)2=16x-10
x=4
7(4)-1=27
16(4)-10=54
You'd make a total of $25,125.46 and the interest is $11,125.46