Answer:
amount is 1000 ×  
 
$40762.20 balance of Donna's account will be 1 million dollars when she retires in 40 years
rate 14.97 %  when Donna's account will have a balance of 1 million dollars in 40 years when principal is $2500
Step-by-step explanation:
principal = $1000
rate = 8 % = 0.08 
to find out 
the future value, S(t)
principal when Donna's account will be 1 million dollars when she retires in 40 year
at what rate Donna's account will have a balance of 1 million dollars in 40 years
solution
we know compounded continuously formula i.e.
amount = principal ×  ..................1
    ..................1
put the value principal and rate in equation 1 to find amount any time
amount = principal ×  
 
amount = 1000 ×  
 
in 2nd part we have time 40 year and amount 1 million so put rate amount and time in equation 1  to find principal
rt = 0.08 × 40 = 3.2
amount = principal × 
1000000 = principal × 
principal = 1000000 / 
principal = 1000000 / 24.5325302
principal = 40762.20397
so $40762.20 balance of Donna's account will be 1 million dollars when she retires in 40 years
in 3rd part we have amount 1 million and principal $2500 and time 40 year put all these in equation 1 to find rate 
amount = principal × 
1000000 = 2500 × 
take ln both side 
ln  =  ln (1000000 / 2500 )
 =  ln (1000000 / 2500 )
40 r = ln 400
r = ln (400) / 40
r = 0.149787
so rate 14.97 %  when Donna's account will have a balance of 1 million dollars in 40 years when principal is $2500
 
        
             
        
        
        
Answer:
124
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
3×
Step-by-step explanation:
0.00000003
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  
10
. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
 
        
             
        
        
        
Answer:
144
Step-by-step explanation:
x^2+24x=17
b=24
(b/2)^2=(24/2)^2=12^2=144
 
        
             
        
        
        
Answer:
60%
Step-by-step explanation:
16 loaves of white bread and 24 loaves of wheat bread. = 40 loaves of bread
P( wheat) = number of wheat/ total
                  = 24/40
                  =.6
                   =60%