Wendy wanted to understand whether students at her school were in favor of an extended school day. she surveyed some students and displayed the results in the table below:
in favor opposed undecided
grade 9 4 7 7
grade 10 9 11 5
grade 11 12 13 5
grade 12 10 5 12
if the principal randomly selects a student in grade 12 from this survey, what is the probability that the student is in favor of extending the school day?
answers:
0.37
0.27
0.49
0.52

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.