Operation Neptune in a school setting-- Page 7

by  Alan Zisman (c) 2004

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Oil Gauge: The oil supply is 100 gallons; the gauge is representing it by 10 dots (count them to be sure!). So each dot represents how many gallons? How many dots are green? Multiply to get the total oil remaining.

Sounder: Your sonar sends sound waves from the top of the water-- they hit the bottom and bounce back. To get the distance, multiply the speed times the time (notice that time may include a fraction!) But that's the distance from the top to the bottom and back up again-- twice what you want. So divide your first answer by 2 to get the final answer.

Combination Lock: You have to do the adding or subtracting in your head! Press the space bar when the answer appears on the top. If you're too slow, wait for it to come around again.

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