Oct 7 2009

[austorior]

We are doing organic gardening by spraying natural pesticides on the plants. I just sprayed 4 fl. ozs of homemade citrus oil added to 1/2 gallon of water, to control mosquitoes. What is the percent of the active materials in the spray if 90% of the citrus oil is water?

A fresh "1.5" volt battery is 1.57 volts. When the voltage drops to 1.45 volts the battery is exhausted. What is the percent difference between the percent error in these voltages, considering the 1.5 as "correct"?

A piece of lava cools according to the formula [unparseable or potentially dangerous latex formula] where 100 deg is the final temperature, 1100deg is the initial temperature, and t is the time in months measured from the time of the eruption. How many years before the temperature of the rocks is 200deg?

The height of mount everest is 28973 ft, and the height of K2, the second highest mountain in the world, is 8614.27m. These mountains are 772 miles apart. How far apart are the horizons seen by the two mountains (assuming a spherical earth) on a straight line between them?

Mary paints the exterior of a 10-ft tall, 200sqft detached garage in 2hrs. How long does it take her to paint the exterior of a 12-ft tall, 1800sqft house of similar proportions?

What is the [unparseable or potentially dangerous latex formula]?

The sum of the diameter and height of a cylinder equals 8in. What is the diameter that results in maximum cylinder volume?

[88bobcat]