Answer:
so what's the question? i'm a bit confused..
Step-by-step explanation:
Answer:
A=640.88
Step-by-step explanation:
if the diameter is 12, the radius , r=12/2=6
we have r=6, h=11
Surface area, A= 2πrh+2π r^2
A=2*3.14*6*11+2*3.14*(6)^2=640.88
Solving the system of equations, it is found that a viable time that the trains are side by side is given by:
B. 15 sec
<h3>What is a system of equations?</h3>
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the equations are:


They will be side by side when:


It's solution is a quadratic function with coefficients a = 14, b = -130, c = -1200, hence:



Time is a non-negative measure, hence option B is correct.
More can be learned about a system of equations at brainly.com/question/24342899
Step-by-step explanation:
-2x-2x+5=-1-2x-2x+5=1