<span>v = 4/3*pi*r^3
derivating both sides with respect to t
dv/dt = 4*pi*r^2*dr/dt
when d = 1.7, r = 0.85, and dv/dt = 2:
2 = 4*pi*(0.85)^2*dr/dt
thus
dr/dt = 1/(2pi*(0.85)^2)
=1/(2*3.14*0.85^2)
=0.22</span><span />
Answer:

Step-by-step explanation:
Assuming one root of a polynomial function is

Then the other root is

The reason is that , complex roots of polynomial functions occur in pairs.
One complex root is the conjugate of the other.
This means that, if

is a root, then

is also a root.
Answer:
4
Step-by-step explanation:
because i know how to do it
Answer:
Option 3) -6,-5/2
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
so
substitute in the formula