V= 70(1.25)^t, where v is in dollars and t is the number of years since 1975. find the rate, in dollars per year, at which the price is increasing.

87.5 per year put how ever many years since 1975 in as t...2016 would be 41 so 41 times 87.5 equals 3587.5

I'll say b) log(- that if not let me know what i can do

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm