SOLUTION: The formula R equals minus 0.075t plus 3.85 can be used to predict the world record in the 1500 meter​ run, t years after 1930. Determine an inequality that identifies the y

Algebra ->  Inequalities -> SOLUTION: The formula R equals minus 0.075t plus 3.85 can be used to predict the world record in the 1500 meter​ run, t years after 1930. Determine an inequality that identifies the y      Log On


   

Question 1118431: The formula R equals minus 0.075t plus 3.85 can be used to predict the world record in the 1500 meter​ run, t years after 1930. Determine an inequality that identifies the years in which the world record will be less than 3.7 minutes.
Found 2 solutions by solver91311, josmiceli:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




Solve for the minimum value of . Note the "strictly less than" relationship required, and note that valid values of must be integers. Then the years in which the world record will be less than 3.7 minutes is et. seq.

John

My calculator said it, I believe it, that settles it

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+R+=+-.075t+%2B+3.85+
+R+%3C+3.7+
+-.075t+%2B+3.85+%3C+3.7+
Add +.075t+ to both sides
+3.85+%3C+3.7+%2B+.075t+
+.075t+%2B+3.7+%3E+3.85+
+.075t+%3E+.15+
+t+%3E+2+
1930 + 2 = 1932
Every year after 1932, the record will be
less than 3.7 minutes