Which fraction expresses-10/45 in lowest terms?

a.-1/3

b.-2/9

c.-1/9

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?

Identify the number 127 as a rational or irrational. explain

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries