Oct 28 2009

[austorior]

The Rankine absolute temperature scale is approximately the Fahrenheit temperature plus 459.67. What temp in Rankine equals the negative of the temperature in Centigrade?

An insect pest population doubles every 18days. If an insecticide kills 90% of the insects, how often should it be applied to keep in insect population in check?
I got [unparseable or potentially dangerous latex formula] to determine the number of insects, but I forgot how to apply the 90% thing...

A firework travels straight up into a maximum height of 270ft before exploding. What was the release velocity?

A large amount of dough is rolled out and as many circular cookies as possible are cut from the rolled-out dough. The remaining dough is piled together, rerolled and more circular cookies are similarly cut. What percent of the original amount of dough is left over?

A cube originally with side dimension a=3 cm begins to expand at 7[unparseable or potentially dangerous latex formula]. At what rate is the surface area changing when a=7cm?

[88bobcat]

[AuSmith]