Arestaurant charges $5 for one sandwich $9.90 for two sandwiches and $14.25 for three sandwiches is this situation proportional

yes

Step-by-step explanation:

$5/1=$5

$9.9/2=$4.95

$14.25/3=$4.75

Step-by-step explanation:

it is not proportional since the ratios are different

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)

it could be 1,3 and more others to create a cylinder.

step-by-step explanation: