A GPC experiment (refractive index detector) yields the following results for an experimental poly(isobutylene) (PIB) sample:elutiondetector elution detectortime, minresponse time, min response29.5 0 35.0 4.6 30.0 0 35.5 2.7 30.5 0.7 36.0 2.3 31.0 2.1 36.5 1.5 31.5 3.3 37.0 1.1 32.0 4.9 37.5 0.7 32.5 3.8 38.0 0.4 33.0 2.7 38.5 0.2 33.5 2.8 39.0 0.1 34.0 3.7 39.5 0 34.5 5.5 40.0 0 Draw the structure of PIB with all atoms. Three nearly monodisperse PIBsamples (M = 2x105, 2x104, and 2x103 g/mol) are injected into the instrument producing sharp peaks at retention times of 31.5, 35.6, and 39.5 min. What are Mn, Mw, and the PDI for this sample? Note: Keep proper track of the calibration data.

At river bank, checking account customers earn 0.75% interest a month on their account balances, pay no service fees for writing checks, and pay a monthly $2.00 financial charge. calculate the income earned in one month on the checking account for a customer with an account balance of $1,000. a. $4.25 b. $5.50 c. $6.75 d. $7.25 checking account earnings at baker’s bank are expressed by the equation: i = -0.09x + 10.2. while the earnings at elite bank are modeled by: i = -0.02x + 7.5. in both cases, x is the number of checks written. at what number of checks will elite bank start generating more checking account income than baker's bank? a. 12 b. 25 c. 39 d. 42 emilio’s checking account had a balance of 728.32 at the beginning of the week. he wrote checks for the following amounts throughout the week: $99.48, $33.50, $18.23, and $72.05. he also deposited his paycheck in the amount of $1,109.90. what is his account balance at the end of the week? a. $1,192.35 b. $1,222.86 c. $1,540.52 d. $1,614.96