8. Filmmakers photograph movies on very long pieces of 35-mm film. Movie projectors play film at the rate of 90 feet per minute. A one-minute movie is
90 feet long. This list shows the running times of some popular movies.
Finding Nemo
1 hour, 41 minutes
The Fellowship of the Ring 2 hours, 58 minutes
• Beauty and the Beast 1 hour, 24 minutes
• Field of Dreams
1 hour, 46 minutes
a. Calculate how many feet of film you need for each movie.
b. A movie is m minutes long. Find a rule to calculate how many feet of film
you need for the movie.
c. How many feet of film do you need for a movie that is 4 hours long?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.