Final answer:
Maria is paid $18.00 per computer installed; multiplying this rate by the 33 computers she installed last week, her gross pay is $594.00.
Step-by-step explanation:
Maria earns $18.00 for each computer she installs. To find her gross pay for last week, we multiply the number of computers she installed by her pay per computer. Since she installed 33 computers, we calculate her gross pay as follows:
Gross Pay = Number of Computers × Pay per Computer
Gross Pay = 33 × $18.00
Gross Pay = $594.00
Therefore, Maria's gross pay for last week is $594.00.