Answer:
Step-by-step explanation:
11. 
Area as sum: 
Area as Product: 7(d+4)
12. Area as sum: y*y+y*3
Area as Product: y(y+3)
 
        
             
        
        
        
Answer:
A. 7.2 centimeters
Step-by-step explanation:
The length of the base is 7.2 centimeters. The area of a rectangle is length*width
The length is unknown but the area is known. To find the length, all we have to do is divide the area from the height. 
The working is as follows :
Area = 90 cm²
Height = 12.5 cm
Length = ? 
<em>Length</em><em> </em><em>=</em><em> </em><em>Area</em><em> </em><em>÷</em><em> </em><em>Height</em>
<em>=</em><em> </em><em>90</em><em> </em><em>÷</em><em> </em><em>12</em><em>.</em><em>5</em>
<em>=</em><em> </em><em>7.2cm</em>
 
        
             
        
        
        
Answer:
23,600.
Step-by-step explanation:
23|6
 
        
             
        
        
        
Answer :
<h3>
 
 <u>
 =1048576 ways </u>
 a student can answer the questions on the test if the student answers every question.</h3>
Step-by-step explanation:
Given that a multiple-choice test contains 10 questions and there are 4 possible answers for each question.
∴ Answers=4 options for each question.
<h3>
To find how many ways  a student can answer the given questions on the test if the student answers every question :</h3>
Solving this by product rule
Product rule :
<u>If one event can occur in m ways and a second event occur in n ways, the number of ways of two events can occur in sequence is then m.n</u>
From the given the event of choosing the answer of each question having 4 options is given by
The 1st event of picking the answer of the 1st question=4 ,
 2nd event of picking the answer of the 2nd question=4 , 
3rd event of picking the answer of the 3rd question=4 
,....,
10th event of picking the answer of the 10th question=4.
It can be written as  by using the product rule 



<h3>∴ there are 1048576 ways a student can answer the questions on the test if the student answers every question.</h3>