3. (10 points) true or false? justify your answers. (a) (5 points) there exists a 4 x 3 matrix a of rank 3 such that a1 (b) (5 points) there exists a 3 x 4 matrix a of rank 2 such that

Me with this one question, and i'll upvote the brainliest answer

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

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?