Answer:
5/7
Step-by-step explanation:
20/28=5/7
Hoped i answered u
 
        
                    
             
        
        
        
Answer:
0
Step-by-step explanation:
j(x) = -2 (3/2)^x
j(0) = -2(3/2)^0
        -2(0)
       =0
 
        
             
        
        
        
Answer:
52
Step-by-step explanation:
40% of 130 is 52
 
        
             
        
        
        
Answer:

Step-by-step explanation:
You are given this data:
![\left[\begin{array}{cccccccccccc}long&0&1.5&3&4.5&6&7.5&9&10.5&12&13.5&15&&\\Area&0&18&59&78&93&105&118&128&63&38&0\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccccccccccc%7Dlong%260%261.5%263%264.5%266%267.5%269%2610.5%2612%2613.5%2615%26%26%5C%5CArea%260%2618%2659%2678%2693%26105%26118%26128%2663%2638%260%5Cend%7Barray%7D%5Cright%5D)
First, calculate the x points by dividing the total length in 5:

x=3,6,9,12,15
Now you calculate the half point of the x axis intervals you just calculated:

and find the function values of each of them (the Area for each cut):
A(1.5) = 18
A(4.5)=78
A(7.5)=105
A(10.5)=128
A(13.5)=38
Now you have formed the rectangles (see diagram below).
To calculate the volume, just use the next equation given by the midpoint rule:

 
        
             
        
        
        
Answer:
a, the number of pupils that like maths
b. we are given the number of students in the class and the percentage that like maths
c. percentage of students that like maths x total number of students 
0.7 x 40 
d. 0.7 x 40 
28
Step-by-step explanation:
Number of pupils that like maths = percentage of students that like maths x total number of pupils in the class
(70 / 100) x 40 = 28 pupils