√(80)=√(4*20)=√(4*4*5)=4√5
We know that for all B:
![\csc\text{B}\in(-\infty,-1]\cup[1,\infty)](https://tex.z-dn.net/?f=%5Ccsc%5Ctext%7BB%7D%5Cin%28-%5Cinfty%2C-1%5D%5Ccup%5B1%2C%5Cinfty%29)
So the answer is 0,5 (b.)
(5,7). Because the origin centers 2 by dilation.
Years = Natural Logarithm(Total / Principal) / rate
Years = ln (1,200 / 1,000) / .06
Years = ln (6 / 5) / .06
Years = ln (1.2) / .06
Years = 0.18232155679 / .06
Years =
<span>
<span>
<span>
3.0386926132
</span>
</span>
</span>
Years =
<span>
<span>
<span>
3.0 (rounded)
</span></span></span>answer is B