The sale price of every item in a store is 75% of its usual price. a. The usual price of a backpack is $30, what is its sale price? b. The usual price of a sweatshirt is $18, what is its sale price? c. The usual price of a soccer ball is $24.80, what is its sale price?'

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)

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)

i think its doubled. let me know

step-by-step explanation: