We expect the height of a helium balloon to be increasing, up to the point where it bursts.
The only graph that shows consistently increasing altitude with a final drop is graph D.
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<em>Additional comment</em>
The graph of D shows the altitude increases at an increasing rate. The buoyancy force decreases with altitude, so we expect the balloon would actually have a decreasing rate of altitude increase. The actual curve would likely be concave downward.
Each gallon of gas is used on 23.5 miles. So if you think about it, if Camila drives her car yy miles and uses xx amount of gas, just multiply 23.5 x yy and that will get you your answer!
1 pound is equivalent to 16 ounces. Multiply 4 (pounds) x 16 (ounces) and you get 64. to figure out how many ounces are in 1/8 pound divide 16÷8 and you get 2. Finally you add 64 + 2 which comes out to 66. Your welcome! ;)
