Answer:
bvghb vbub b
Step-by-step explanation:
Equation 1 is 2W - 6 = L
equation 2 is 140= W * L
L=10
W=8
Honestly? Just review your notes and try to work out the problems yourself before taking a look at the answer. You can also google specific topics that the test will cover and try the practice problems.
Answer:
_______________________________________________
1)
72
cm² / min. ;
_______________________________________________
2)
192
cm² / min. _______________________________________________Explanation:____________________________________________ Area of a circle: A =

r² ;
Rate of change of Area is: da/dt = 2

r (dr/dt) ;
Given: dr/dt = 3 cm / min.
______________________________________________________ Problem 1)____________________________________________________________dA/dt = 2

*(12 cm)*(3 cm/ min) =
72
cm² / min. ;
____________________________________________________________ Problem 2)____________________________________________________________dA/dt = 2

*(32 cm)*(3 cm/ min) =
192
cm² / min._____________________________________________________________
Answer:
I think number B
Step-by-step explanation:
I plugged it in the calculator. And then they both were zero.