New PMP Question & Answers with explanation

A project uses rounding of activity cost estimates data to the nearest $100, uses staff hours as the unit of measure for resources, and has a variance threshold of 10 percent deviation from the baseline plan. These approaches are typically documented in the:
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20 percent of the work was completed in a project. At this stage, the project manager determined that the budget at completion (BAC) was no longer viable and developed a forecasted estimate at completion (EAC). What index can the project manager use to look at the calculated projection of cost performance that must be achieved on the remaining work?
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Which of the following is incorrect?
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You are the project manager for Wicked Fast Cars Corp. You are working on a project for the Human Resources department that is scheduled to take one year. After three months into the project, you calculate the EV at $35,000 and the PV at $45,000. Which option below represents the value for the SV?
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You are the Project Manager for JT's Lumber Yard. You are trying to forecast estimates for the final phase of the project you are currently working on. Based on the performance of the project to date, which formula can be used to estimate the total value of the project when completed, assuming similar variances will not occur?
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