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Directions:
Solve
each problem below. When you have decided upon an answer, click the answer box to see if
your answer is correct.
1.
John's bank
account was overdrawn. The status of his account was -$4.15. He did not realize the
problem and wrote another check for $25.00. The bank charged him a $20.00 fee for being
overdrawn. What was the new status of John's account at this point?
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2.
A
proton has a charge of positive one. An electron has a charge of negative one. Find the total charge of an ion with 12 protons and 15 electrons.
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3.
During one week of testing at the
nuclear power plant, electrical output dropped 534 kilowatts. During the next four weeks, output increased 356 kilowatts,
decreased 650 kilowatts, increased 334 kilowatts and increased 351 kilowatts. What was the
net decrease (or increase) in kilowatt output during the testing?
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4.
For each of the
problems below, study the first scale to determine a relationship between the weights of
the items. Then add items to the right side of the second scale so that the second
scale will balance.
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5.
A submarine is at -500 feet, or 500 feet below sea level. The ship
is then directed to descend 650 feet, then to ascend 350 feet, then to descend 340 feet,
then to ascend 150 feet, and then to descend to the ocean floor which is 1200 feet below
sea level. |
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a. How many feet was the
final descent? |
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b. If the first
direction to the ship had been transmitted incorrectly as "descend 750 feet",
what would have happened?
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