Answer: the BEST approximation of the amount of water her fish tank can hold is 21ft^3
Step-by-step explanation:
The shape of Samantha's fish tank is rectangular. The volume of the rectangular fish tank would be expressed as LWH 
Where
L represents length of the tank
W represents the width of the tank.
H represents the height of the tank.
The tank has a height of 2.6 ft, a width of 2.1 ft, and a length of 3.9 ft.
This means that the volume of the fish tank would be 
Volume = 2.6 × 2.1 × 3.9
= 21.294 ft^3
 
        
             
        
        
        
 <span>90 + 35 = 125.
180 -125 = 55 degrees.
 
4.59^2 + 6.55^2 = 8^2
21.1 + 42.9= 64 inches</span>
        
             
        
        
        
Answer:
i think the awnser is c . if unattended, leave the horse tire up 
 
        
             
        
        
        
Answer
Find out the conversion factor for seconds to minutes and convert  135 seconds to minutes.
To prove
1 minute = 60 second
 for seconds to minutes.

Therefore the conversion factor for seconds to minutes be 

Now convert  135 seconds to minutes. 

= 2.25 minutes 
Hence proved
 
        
                    
             
        
        
        
Answer:
Yi Xing invented the astronomical clock and introduced some new methods of interpolation in mathematics.
Step-by-step explanation:
Yi Xing was both an astronomer and a mathematician during the era. He invented the astronomical clock which was more accurate than the initial water and Sun's clock in use. 
Furthermore, Yi Xing also discovered some new methods of interpolation in mathematics of which the meaning and interpretation became controversial. Interpolation is a method majorly in mathematics that can be used to estimate a value of a function from its discrete values. It involves first order differences and second order differences. 
Also, Yi Xing was able to design a calendar in A.D. 727.