This is to be solved from similarity of triangles, so according to similar triangles' rules, The ratio of the length of side DC to the length of side AC is equal to the ratio of the length of side ED to the side AB. So we can solve from the proportion,
Answer:
$3425
Step-by-step explanation:
5% of $68500 is $3425
For starters, find the common change in the terms, in this case each goes down by 3. This lets you know you're gonna have a -3n in your equation as each term decreases by 3. Your equation should be in f(n)=c+rn form, with r being change in f(n), or -3 in this case. This gives you f(n)=c-3n. Now, solve for c, add 3n to both sides to get f(n)+3n=c. Plug in your n of 1 and f(n) of 20 to get c=20+3(1)=23. Plug in your c to your f(n) formula to get f(n)=23-3n as your f(n) function.
