Blue string 5/4 inches long. if the length of the blue string is 5/2 times the length of a piece of green string, what is the length of tv he piece of green string.

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Which answer choice is it? is it the first ,second, third or fourth giving 40 points for whoever answers correctly you