Answer:
B.  
 
Step-by-step explanation:
Total surface area of the square pyramid 
= 4 times the area of one triangle + Area of square 

 
        
             
        
        
        
2(4x+5)>7x+20  perform indicated multiplication on left side
8x+10>7x+20  subtract 7x from both sides
x+10>20  subtract 10 from both sides
x>10
or in interval notation, x=(10, +oo)
        
             
        
        
        
<h2>
Answer:</h2>

<h2>
Step-by-step explanation:</h2>
A trapezoid is a quadrilateral where at least one pair of opposite sides are parallel. In a trapezoid, the both parallel sides are known as the bases of the trapezoid. So we have two bases, namely,  . Also, the height
. Also, the height  of the trapezoid is the length between these two bases that's perpendicular to both sides. So the area of a trapezoid in terms of of
 of the trapezoid is the length between these two bases that's perpendicular to both sides. So the area of a trapezoid in terms of of  is:
 is:

Since:

The area is:

 
        
        
        
Answer: 30 inches
Step-by-step explanation:
Given:
ABC-tringle
BH= 8 in - height
S= 120 in^2
AC-?
Solution:
S=1/2ab
120in=1/2a*8in
120=4a 
4a=120
a=30 in
 
        
             
        
        
        
Answer:
1056.25π square units
Step-by-step explanation:
A few formulas an definitions which will help us:
(1)  , where c is the circumference of a circle and d is its diameter
, where c is the circumference of a circle and d is its diameter
(2)  , where A is the area of a circle with radius r. To put it in terms of d, remember that a circle's diameter is simply twice its radius, or mathematically, (3)
, where A is the area of a circle with radius r. To put it in terms of d, remember that a circle's diameter is simply twice its radius, or mathematically, (3)  .
. 
We can rearrange equation (1) to put d in terms of π and c, giving us (4)  , and we can make a few substitutions in (2) using (3) and (4) to get use the area in terms of the circumference and π:
, and we can make a few substitutions in (2) using (3) and (4) to get use the area in terms of the circumference and π:

We can now substitute c for our circumference, 65, to get our answer in terms of π:
