Answer:
46.2
Step-by-step explanation:
 If you divide 231 by 5 then you get that answer.
 
        
             
        
        
        
400×10=4000
400×2=800
50×10=500
50×2=100
2×10=20
2×2=4
4000+800+500+100+20+4=5,424
Check answer by multiplying 452 and 12
452×12=5,424
        
             
        
        
        
The value of log(0.47) after rounding to 4 decimal place is -0.3279
Option D
Given :
Find the value of log(0.47) using calculator 
To find the log value we use the calculator 
here we are asked to find out log (0.47) that is the log (decimal)
we cannot find the log value without calculator because we have decimal argument inside log.
Use scientific calculator 
Press log first then enter the number 0.47 inside a parenthesis 
Press enter , it will show you the log(0.47)
log(0.47) =-0.327902142
Now round the answer to 4 decimal places
We have 0 in the 5th decimal place . so we keep 9 as it is 
log(0.47) =-0.3279 
Learn more :  brainly.com/question/10101390
 
        
             
        
        
        
Given:
The price of bananas can be determined by the equation P=0.25n, where P is the price and n is the number of bananas.
To find:
The constant of proportionality
Solution:
We have,
 ...(i)
       ...(i)
where P is the price and n is the number of bananas.
Price P is directly proportional to the number of bananas. So,

 ...(ii)
            ...(ii)
Where, k is the constant of proportionality.
On comparing (i) and (ii), we get

Therefore, the constant of proportionality is 0.25.
 
        
             
        
        
        
Answer:I hope the following example will help you 
Step-by-step explanation:
Ex1: If $1000 is invested now with simple interest of 8% per year. Find the new amount after two years.
P = $1000, t = 2 years, r = 0.08.
A = 1000(1+0.08(2)) = 1000(1.16) = 1160