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 arguments should sarah use to support her suggestion? check all that apply.

More trials will increase confidence in the results

Explanation:

1) More trials will not prove the results , since doing more trials gives more data for the same experiment , but it will not tell us anything about the conditions that judge the validity of the hypothesis.

2) More trials will not reduce mistakes , but it will help us to identify if there was a mistake in one of the trials → if there is 1 result that deviates significantly from the other 2

3) More trials will not guarantee correct results →  since there is always deviations to the right value

4) More trials will increase the confidence in the results →  since more trials will focus the mean of the results into the right value ( will reduce the standard deviation of the mean).

5) More trials will not help us to identity other possible solutions → since more trials will gives us more data of the same experiment under the same conditions , but it will not analyse the results.

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i think the answer is b

f=ma newton's second law 7x8=56n