For a triangle the area is given as:

Re-arrange / solve for 'h':

Substitute known values:

Compute:

 
 
 
        
        
        
 Answer:
4 or 3.75
Step-by-step explanation:
there are 16 cups in a gallon
60/16 is 3.75 
if you want you can round up 
but to have an even amount it would be 4
 
        
                    
             
        
        
        
Answer:
25π
Step-by-step explanation:
pi's symbol is π, which will be used sometimes to make it easier later
The circumference is equal to diameter multiplied by pi. (Diameter is the length across the circle, radius the center of the circle to an edge point aka. half the diameter, and circumference is the edge length aka. perimeter of the circle.)
We can then remove the pi off the 10, as the diameter multiplied by pi is the circumference, so the diameter is 10.
Half of 10 is 5, the radius.
The formula for area of a circle is radius squared times pi, remember easily by π r ^2
We can plug in the radius into the formula to get
π 5 ^2
And finish it by solving the square root to get
π 25
25π
 
        
             
        
        
        
35
“Negative times a negative is a positive”