Answer: the answer is -3
Step-by-step explanation:
I'm pretty sure it was Step One. When you multiply -1/4, I don't think the symbol is supposed to change to an addition sign. It's supposed to still be a minus sign.
The area of a circle:
A = πr²
dA/dr = 2πr
We are given dA/dt, using the chain rule
dr/dt = dA/dt x dr/dA
dr/dt = 1 x 1/2πr
When circumference = 2 cm:
2 = 2πr
r = 1/π; putting this value of r
dr/dt = 1/2π(1/π)
dr/dt = 1/2 cm/s
The radius is increasing at a rate of 1/2 cm/s.
Explanation is in the file
tinyurl.com/wpazsebu
Answer:
20 pages
Step-by-step explanation:
85%=17 ? what about 100%
100multiplied by 17 divided by 85% =20
