Answer:
t = 0
Step-by-step explanation:
x = 10 − t²
dx/dt = -2t
y = t³ − 12t
dy/dt = 3t² − 12
dy/dx = (3t² − 12) / (-2t)
dy/dx = (12 − 3t²) / (2t)
dy/dx is undefined when the denominator equals 0.
2t = 0
t = 0
Length of the cylinder = 84.5 cm
Diameter of the cylinder = 2.40 cm
The circumference is
π(2.40 cm) = 2.4π cm.
The area is
A = (2.4π cm)*(84.5 cm) = 637.1 cm²
Answer: a. 637 cm²
I believe by the first equation they are referring two a representation of the total amount of money made up by the two types of coins. I found this to be 0.05x + 0.10y = 3.50
In my work I solved for the amount of each coin- I assume this is what the final step of your problem entails. If you need any help understanding/ I misinterpreted something please feel free to comment and ask :)
#5c coins or x= 36
#10c coins or y= 17
Answer:
25+4+120(2min) = 149
25/149 = 0.16778523489932885906040268456376
= (rounded) 0.17