The period of a pendulum is the time the pendulum takes to swing back and forth. the function l=0.81t^2 relates the length l in feet of a pendulum to the time t in seconds that it takes to swing back and forth. a convention center has a pendulum that is 140 feet long. find the period

Period = 13.15 s

Solution:  

The period of a pendulum is the time of pendulum takes to swing back and forth.  

Function

Where,  

L is length of pendulum in feet  

T is time of pendulum in seconds  

We have to calculate the time of pendulum whose length is 140 feet.  

So, we substitute L=140 into formula and to solve for t  

We get t,  

s

Period = 13.15 s

d

step-by-step explanation:

the solution is in the picture