The access code for a car's security system consists of five digitsThe first digit cannot be 8 and the last digit must be odd. How many different codes are available ? ( note that 0 is considered an even number.)

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

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step-by-step explanation:

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1.m=2

2.m=-6

3.m=3

4.m=1/2

glad to