The graph shows the percentage of high school seniors who used alcohol or marijuana during the 30 days prior to being surveyed. The data can be described by the following mathematical models, where n is the number of years after 1980, A is the percentage of seniors using alcohol, and M is the percentage of seniors using marijuana. A= -0.7 +54 M = -0.4n+26 was about 1990 1980 Alcohol and Marijuana Use by High School Seniors a. Use the appropriate line graph to determine the percentage of seniors who used marijuana in 1985. (Type a whole number.) b. Use the appropriate formula to determine the percentage of seniors who used marijuana in 1985. % (Type an integer or a decimal.) Does the formula underestimate or overestimate the actual data shown by the graph? By how much? The formula by c. Use the appropriate line graph to estimate the percentage of seniors who used alcohol in 1985. % (Type a whole number.) d. Use the appropriate formula to determine the percentage of seniors who used alcohol in 1985. % (Type an integer or a decimal.) How does this compare with the estimate from part (c)? 1985 A 80+ 70 60+ 50+ OA. The formula appears to underestimate the percentage, when compared to the line graph. OB. The formula appears to overestimate the percentage, when compared to the line graph. 1995 PA 30+ 20+ 10- 2000 Alcohol e. For the period from 1980 through 2009, in which year was marijuana use by seniors at a minimum? Estimate the percentage of seniors who used marijuana in that year. The percentage of seniors who used marijuana in Marijuana of 1980 1985 1990 1995 2000 05 09 Year Q

Please type out your Solutions I have bad eyesight and handwriting can be hard for me to read  please write out your Solutions please write out your Solutions

A motorboat take 3 take to travel 144 kilometers going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?

Gold is alloyed with different metals to make it hard enough to he used in jewelry. The amount of gold present in a gold alloy is measures in 24 the called karats. 24 karat gold is 100% gold. Similarly 18 karat is 75% gold. How many ounces of 14 karat gold should be added to an amount of 8Karat gold to make 6 ounces of 12 karat gold?