
Differentiate both sides wrt
:

By the chain rule, we get


Solve for
:


Answer:
2
Step-by-step explanation:
Arc length = r × theta
Arc length = 5 × 0.4
= 2
Answer:
f(x) = (x-2) (x+10)
Step-by-step explanation:
f(x)=x^2+8x-20
Factor the right hand side
What 2 numbers multiply to -20 and add to 8
-2 * 10 = -20
-2 + 10 = 8
f(x) = (x-2) (x+10)
Then we can use the zero product property to help us to find the zero's

=47.8888 when you round it up you can get get about 48 then you estimate to about 50.
Answer:
Option 3
Step-by-step explanation:
It is the only one that increases by 8 just like the pattern