The owner of a car wash calculates that by hiring one additional worker, the car wash can wash 50 more cars per week at an average of $5 per wash. the owner will pay the worker $9 per hour for 30 hours per week.
what do you think the owner's decision will be when considering marginal costs and benefits?
a. the owner will hire the worker because the marginal costs of $270 per week will be offset by the benefit of doing more car washes each week.
b. the owner will not hire the worker because the marginal costs of $270 per week are greater than the marginal benefits of $250 per week.
c. the owner will not hire the worker because the marginal costs of $250 per week are less than the marginal benefits of $270 per week.
d. the owner will hire the worker because the marginal costs of $250 per week are less than the marginal benefits of $270 per week.

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