Answer:
15 (mark me brainliest if you want and lmk if you need more help understanding)
Step-by-step explanation:
perimeter is (l*w)*2
if a pentagon is 5 sided, you do 75/5 which is 15. 
each side has 15 cm
 
        
             
        
        
        
It could possibly be the first on but I’m not completely sure
        
             
        
        
        
Answer:
B (6 , 0)
Step-by-step explanation:
(2,8)      Add 2 to x-axis and subtract 1 from y-axis
(4,1)
(6,0)
 
        
             
        
        
        
Given 
s=16t^2 
where
s=distance in feet travelled (downwards) since airborne with zero vertical velocity and zero air-resistance
t=time in seconds after release
Here we're given
s=144 feet
=>
s=144=16t^2 
=> 
t^2=144/16=9
so
t=3
Ans. after 3 seconds, the object hits the ground 144 ft. below.