Asked by Keonn'a

15. Each of the following temperature ranges is in degrees Fahrenheit. Use the formula F=95 C+32 to find the corresponding temperature range in degrees Celsius (using interval notation and assume inclusion).

16.The fuel efficiency (mpg rating) for cars has been increasing steadily since 1980 . The formula for a car's fuel efficiency for a given year between 1980 and 1996 is

E=0.36x+15.9

where E is miles per gallon and x is the number of years after 1980 .

a. In what years was the average fuel efficiency for cars less than 17 mpg (in interval form)?
b. In what years was the average fuel efficiency for cars more than 20 mpg (in interval form)?

Answers

Answered by Damon
Your temp conversion is wrong
F = (9/5)C + 32
Answered by Damon
E = 0.36 ( y-1980) +15.9
when does E reach 17 ?
17 -15.9 = .36 y - .36*1980
.36 y = 1.1 + 712.8 = 713.9
y = 713.9/.36
y = 1983
so y <1983

now do the same with E = 20
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions