Unformatted text preview: Week 3 CheckPoinl Ā«_ 4, groggy 52,63,530 50,565,, 3,0,3. 1Ā» @Exercise Score:'o m5 _1 pt Assignment Score: 33,3355 (26.5 of.30 pts) soofan complĆ©te The formula R:  0.075t+ 3.85 can be used to predict the world record in the 1500 meter run, t
years aļ¬er 1930. Determine an inequality that identiļ¬es the years in which the world record
will be less than 3 4 minutes. Solve for t. t > .6ā
(Round to the nearest whole number.) This translates to {Y  Y > .1935}. Question is complete. Roll your mouse over the red indicators to see incorrect answers. All paHs's'h'owing
BE The formula R:  0.075t+ 3.85 can be usedto predict the world record in the 1500 meter runt years after 1930. Determine an inequality that identiļ¬es the years in which the world record will
be less than 2.5 minutes. Ifthe world record is less than 2.5 minutes, then R < 2.5 and the folloWing inequality is true.
ā0075t+385<25
Subtract 3.85 from both sides.
, 0.075t+ 3.85ā 3.85 < 2.5ā 3.85
ā 0.075t< ā 1.35
Divide by  0075. Note that dividing by a negative number reverses the inequality symbol ā0.075t āl.35
7>  0.075  0.075 t>18 Since tis years aļ¬er 1930, the years inwhich the record is less than 2.5 minutes are described
by the solution set. The solution set is {YI Y> 1948}. Question is complete. a
āsāļ¬ād. ...
View
Full Document
 Fall '09
 CHRISDEETER

Click to edit the document details