An old road was 3.95 miles long. after a renovation it was 3.81 times as long. how long was the road after the renovation?

So, this is a multistep problem. First, we need to convert everything to inches, find the diagonal of the right triangle, and then find the perimeter.

Converting feet to inches: There are 12 inches in one foot. Since the right triangle has a leg that is 2 feet, we need to multiply that by 12. 2×12=24; So, the leg is 24 inches long.

Finding the diagonal: We use this equation to find the hypotenuse: a²+b²=c² We know the legs of the triangle, we just need to find the diagonal.

24²+18²=c² 576+324=900 √900=30; So, the length of the diagonal is 30 inches.

Finding the perimeter: We need to add up all the sides.

30+24+18=72

So, the perimeter of the triangle is 72 inches.