PLEASE ANSWER ILL GIVE YOU 100 POINTS IF YOU ANSWER REASONABLY AND QUICKLY!!! Mrs. Vega assigned her students a book report about the most recent novel discussed in class. The following dot plot displays the number of pages written by the students in her first-period class. What percent of Mrs. Vega's class wrote a 4 page book report? 3% 12% 30% 33.13%

(She has 18 students and 6 students wrote 4 pages)

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.