Thursday
June 20, 2013

# Posts by al

Total # Posts: 253

math
Thank you, Steve.

math
Sasa had some 20-cent and 50-cent coins. 7/8 of the coins were 20-cent coins and the rest were 50-cent coins.After Sasa had spent \$72.50 worth of 50-cent coins and 5/7 of the 20-cent coins, she had 2/7 of the coins left. Find the total amount of money Sasa left.

chem
Predict out of which of the following would a dialysis bag be permeable to? Potassium Ions= DNA= Sucrose= No? Starch =No? Sulfate Ion=yes Chloride Ion=yes Protein=No I'm not sure about potassium ions or DNA though.

math
Thank you, Steve! Appreciate your help.

math
May and Bill took 49 hours to complete their History project. They worked separately on their own project. If May had worked 5 hours less and Bill had worked 6 hours more, May would have put in 2 hours more than Bill. How many hours did May put in for the History project?

math
Thanks a lot Steve!

math
Mrs Sim spent some money on 45 buns. She spent the same amount of money on 20 muffins. Each muffin cost \$0.95 more than each bun. How much did she spent altogether?

Calc.
1000 yds of fence x 1000-x 1. Show that the area function to be maximized is A(x) = ( pi + 4 / 16pi) x^2-125x+62500 2. Show that the critical point of A(x) is x=1000pi/pi+4 3. 1000yds of fencing and y>2r, find the values of r and y that maximizes the area of this new region...

SOCIAL STUDIES
HOW OLD IS THE GREAT BARRIER REEF?

Social Studies
Where is the great barrier reef?

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