Wednesday

August 20, 2014

August 20, 2014

Posted by **patti help** on Friday, March 2, 2007 at 5:03pm.

second task takes 12 min

third task takes 21 nin

how long dids the 3 tasks take, as a fraction of a hour

7/30+12/30+21/30=40/30 =1 1/3 hr

is that right?

no 2/3

Prinness is correct. There are 60 minutes (not 30) in an hour. So -- your answer would be 40/60 = 2/3 hour.

**Related Questions**

math - need to check answers please 9/11-3/11+7/11=13/11=1 2/11 evaluate then ...

Radical and Rational exponents - Estimate how long it takes you to complete a ...

MATH - An application of a rational function is T = (AB)/(A+B), which gives the...

math - it takes janet 9 hours to do a task and it take jancie 10 hours to do the...

College Algebra - Part 1: Using the Library, web resources, and/or other ...

Computer Science - Mythical Man question: If it takes one person 3 months to ...

math - if wayne completed a task in one hour and sarah completed a task in two ...

Algebra - One person can complete a task in 3 minutes. A second person can ...

operation management - A firm is planning to set up an assembly line to assemble...

college algebra - Find the time for two people working together to complete half...