Amy had 8/9 of a spool of yarn. She used 2/5 of her yarn for a project. What fraction of the spool was used for the project?
Write your answer in simplest form.

i think the answer is b)

step-by-step explanation:

hello,

as   long as they add up to 180 its correct.

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions