What is the following correctly express the number below in scientific notation 395,000,000 A. 395•10⁸
B. 3.95•10⁹
C. 395•10¹⁰
D. 39.6•10⁹
E. 3.95•10⁸
F. 3.95•10⁷

42% of the students prefer a concert over a movie.  

A greater ratio of 11th graders prefer a concert to a movie.

The difference in the percent of students who prefer a movie over a concert is16%.  

Step-by-step explanation:

              10th   11th   12th   total

movie       .18    .16     .24    .58

concert     .15     .18     .09   .42

total           .33     .34    .33    1

The marginal relative frequency for 10th graders is 0.18.   This is an incomplete statement

The marginal frequency is a number not a percent

42% of the students prefer a concert over a movie.   42% preferred a convert to the 58% who preferred a movie.  True

A greater ratio of 11th graders prefer a concert to a movie. 18/100 concert to 16/100 for the movie for 11th graders

18:16  This is true

More 12th graders were surveyed than any other grade level.

There were more 11th graders surveyed (34%) to (33%) for 12 graders False

The difference in the percent of students who prefer a movie over a concert is16%.  True