Which expression is equal to 6.5(2r – s) + 3.7r – 1.25s written in simplest form? A) 16.7r-7.75s
B) 16.7r-5.25s
C) 13r-6.5s+2.45
D) 13r-7.75s+2.45rs

A

Step-by-step explanation:

13r-6.5s+3.7r-1.25s

13r+3.7r-6.5s-1.25s

=16.7r-7.75s

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)

80% of the cookies

step-by-step explanation: