There is a lot of numbers
        
                    
             
        
        
        
Answer:
A)10.25 cm ; B)5 square cm   
Step-by-step explanation:
A)
Formula:
p=(a+b+c)          [p= perimeter ;  a,b , and c are the side lengths.]
∴The perimeter of the triangle =(4+2.75+3.5) cm  
                                                 =10.25 cm
B)
Formula:
A = 1/2 . b .h     [A=area ; b= base ; h= height]
∴The area of the triangle = (1/2 . 4 . 2.5) square cm    [b=4 ; h=2.5]
                                          =5 square cm   
 
        
             
        
        
        
Answer:
 A good rule is to change 10 to 15 percent of the water each week. If your tank is heavily stocked, bump that up to 20 percent each week. A lightly stocked aquarium can maybe get by for two to four weeks, but this should be the maximum length of time between water changes.
Step-by-step explanation:
This is the correct answer you want
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(2*3*1)=6
135/6=22.5
1st = 22.5 ft
2nd= 45 ft
3rd = 67.5 ft
add it up and you get 135 feet
        
             
        
        
        
B) <span>Stocks tend to be better long-term investments than bonds because bonds do not have the same growth potential that stocks do.</span>