At the corner store, nico bought 5 pencils for $0.10 each and 3 pens for $0.50 each. he used t to represent the sales tax, in dollars, that he also paid. he paid a total of $2.12, including tax.

nico wrote this equation to represent what he paid. what errors, if any, did he make?

5(0.10) + 3(0.50) - t = 2.12
he should have multiplied 0.10 by 3 instead of 5.
he should have multiplied 0.50 by 5 instead of 3.
he should have added t instead of subtracting t.
he should have multiplied by t instead of subtracting t.

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?