For the 1st digit we can use 9 of them ( it cannot be 1 ). For the 2nd and the 3rd we can use 10 and for last one we can use 5 digits ( 0, 2 , 4 , 6 and 8 ).
9 · 10 · 10 · 5 = 4,500
Answer: 4.500 different codes.
Answer:
Ill help
Step-by-step explanation:
Answer:
The interest earned the following year = $75
Step-by-step explanation:
Interest = $75
Rate = 4%
Time = 1 year
To find the Principal, Using the formula for Simple Interest :
![\text{Simple Interest = }\frac{Principal\times Rate\times Time}{100}\\\\\implies 75=\frac{Principal\times 4\times 1}{100} \\\\\bf\implies Principal = \$1875](https://tex.z-dn.net/?f=%5Ctext%7BSimple%20Interest%20%3D%20%7D%5Cfrac%7BPrincipal%5Ctimes%20Rate%5Ctimes%20Time%7D%7B100%7D%5C%5C%5C%5C%5Cimplies%2075%3D%5Cfrac%7BPrincipal%5Ctimes%204%5Ctimes%201%7D%7B100%7D%20%5C%5C%5C%5C%5Cbf%5Cimplies%20Principal%20%3D%20%5C%241875)
Now, to find amount of interest for the second year :
T = 2 years
t = 1 year
Principal = $1875
Rate = 4%
![\text{Simple Interest = }\frac{Principal\times Rate\times (T-t)}{100}\\\\\implies\text{Simple Interest = }\frac{1875\times 4\times (2-1)}{100}\\\\\bf\implies\textbf{Simple Interest = }\$75](https://tex.z-dn.net/?f=%5Ctext%7BSimple%20Interest%20%3D%20%7D%5Cfrac%7BPrincipal%5Ctimes%20Rate%5Ctimes%20%28T-t%29%7D%7B100%7D%5C%5C%5C%5C%5Cimplies%5Ctext%7BSimple%20Interest%20%3D%20%7D%5Cfrac%7B1875%5Ctimes%204%5Ctimes%20%282-1%29%7D%7B100%7D%5C%5C%5C%5C%5Cbf%5Cimplies%5Ctextbf%7BSimple%20Interest%20%20%3D%20%7D%5C%2475)
Hence, The interest earned the following year = $75
I think it is 6 I hope you get it right good luck but I think that is the answer but it should be 6