I'm trash at graphing somewhat. I need help with IXL homework, and I have only 8 questions to do for it to count. Could someone help me throughout this?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?