The regular price of ice cream is $3.75. Today the ice cream parlor is running a cell which has the ice cream $1.25. Which rational number represents the change in price?

First, subtract the regular price - sale price. The change in price is $2.50. And 2.50 is a rational number, so $2.50 is your answer :)

y=mx+b is the final answer!   : )

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)