Answer:
$13,200
Step-by-step explanation:
You need to use the simple interest formula 
I = P * r * t
I = Interest accrued
P = Principal amount invested 
r = Interest rate          you need to divide by 100 to get it in decimal form
t = time, in years        if you are given a partial year, divide the months by 12
P = $12,000                                    
r = 7.5% = .075                                    
t = 1                                                  
But, because we want I to equal $990 then I is
I = $990
So we ignore our P and instead solve for the P that will give us the desired result.
I = P * r * t
$990 = P * .075 * 1
$990 = P.075        Divide each side by .075
$990/.075 = P.075/.075
$990/.075 = P
$13,200 = P
So, to earn an annual interest income of $990, $13,200 will have to be invested in the 7.5% bond.
 
        
             
        
        
        
Answer:
B. 393,660
Step-by-step explanation:
lemme get Brainliest please
 
        
                    
             
        
        
        
Set up a system of equations.
d + q = 75
.1d + .25q = 14.25
Multiply the first equation by -.1 so that the "d's" will cancel.
-.1d -.1q = -7.5
.1d +.25q = 14.25
Now add the two equations together
      .15q = 6.75
divide both sides by .15
        q = 45
There are 45 quarters in the jar
        
             
        
        
        
Answer:
(in the image)
Step-by-step explanation:
I'm not sure I understood your question completely but I hope this helps.