Answer:
Property of Addition
Step-by-step explanation:
<span><span>x=0,<span>√70</span>,<span>−<span>√70</span></span></span><span>x=0,70,<span>-70</span></span></span><span>x≈0,8.36660026,<span>−<span>8.3666002</span></span></span>

Hence,

is cutting each other in this equation.
So,

can be of any value.i.e.,infinite.
Hope this will help you.
If you like my answer. Please mark it as brainliest And Be my follower if possible.
Radius = 1.25cm
81cm3 / 20 = 4.05 cm3 per cone
V cone = πr^2 (h/3)
So then 4.05 = π(1.25)^2 (h/3)
Then h/3 = .825 and then
h = 2.475 cm