In a diagnostic, a student correctly answers about 50% of the questions posed. However, after a full semester, there was 63 points missed out of a total of 150 points attempted; that is, the student answered 87 points correctly. Obtain a 95% confidence interval for the true proportion of correctly answered questions. Interpret your results in the context of the problem. State the margin of error.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.