Mitchell records the amount of time a toy car takes to travel down a ramp one time for each of four slope angles. His lab partner, Sarah, suggests that he run the same set of trials two more times. What argument should Sarah use to support her suggestion?
1.More trials will prove the results.
2.More trials will reduce mistakes.
3.More trials will guarantee correct results.
4.More trials will help identify other possible problems.

NEED ANSWERS ASAP

A. More trials will prove the results

Explanation:

I just got it right on Edg :)

The spherical shape is caused by the surface tension of the blood. Surface Tension causes the blood drop to pull itself in; both horizontally and vertically. The blood drop will settle into a spherical shape, as a result of the surface tension.

The texture of the target surface upon which a drop of blood falls affects the size and shape of the bloodstain pattern. Hard, nonporous surfaces will produce circular stain patterns that have smooth edges, but softer, porous surfaces will produce spatter stains that are scalloped or have rough edges.

What three forces are involved in eventually causing the drop of blood to fall? the force of gravity, the adhesive force, the force of energy.

Explanation:

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