Answer:
It is A
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
   29 m³
Step-by-step explanation:
The applicable formula is ...
   V = (1/3)Bh
Assuming the height is 10 m, the volume is ...
   V = (1/3)(8.7 m²)(10 m) = 29 m³
_____
The shape of the base is irrelevant.
 
        
             
        
        
        
Y = 2x + 12
2(4) + 12 = 8 + 12 = 20
She spends $20
        
             
        
        
        
Answer:
325
Step-by-step explanation:
You must have heard about Arithmetic Progressions (AP)
Arithmetic progressions are a series of numbers such that every successive number is the sum of a constant number and the previous number. 
Our very own counting numbers form AP
For example :-
2 = 1 + <u>1</u>
3 = 2 + <u>1</u>
4 = 3 + <u>1</u>
The number in bold (1) is that constant number which is added to a number to form its successive number. 
To find the sum of series forming AP, we use the formula :-

here, 
- n is the number of terms
- a is the first number of the series 
- an is the last number of the series
So we'll use all this information to find the sum of continuous numbers from 1 to 25 where 1 is the first term(a) and 25 is the last(an). 
and n is 25




So, the value of S comes out to be 325.