-220+18z represents a submarine that began at depth of 220 feet below sea level and ascended at a rate of 18 feet what was the depth at 5 min

130 feet below sea level, or -130 feet

Step-by-step explanation:

Assuming you meant 18 ft per minute, it will have rose 90 feet in five minutes, 18*5=90

-220+90=-130

$450.00 for 6 weeks

or

$300

step-by-step explanation:

$200.00 for first week $50.00 x5 equals $250 plus $200 equals $450.00 for six weeks.

$200 for first week

$200 x 0.10 = $20

$20 x 5 = $100

$200 + $100 = $300