calculus
A cylindrical container is to hold 20π cm^3. The top and bottom are made of a material that costs $0.40 per cm^2. The material for the curved side costs $0.32 per cm^2. Find the height in centimeters of the most economical container.
calculus
Suppose you have 400 meters of fencing and you wish to enclose a rectangular space with two parallel partitions: What is the maximum total area of the enclosed space, in square meters?
math
Miss Ramirez has invested $6,000 at 5%. How much additional money must she invest at 8% so that her annual income from the two investments will be 6% of the total amount invested?
AP Chem
Is that because it's a solid and not a gas?
AP Chem
For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant t...
6th grade math
n/4+32=72 (sub. 32) n/4=40 (multiply by 4) n=160
6th grade math
Multiply both sides by 4
Chem Help!!!!
I balanced the equation and got 2Cr+3O2->2CrO3.. but I was informed that this is the incorrect answer
Chem Help!!!!
In an experiment, 0.771g Cr(s)reacts completely with 0.712g O2 to form a single solid compound. Write a balanced equation
Chemistry Help!!!!!
How many milliliters of 0.635M K2CrO4 are needed to precipitate all the silver in 410mL of 0.158M AgNO3 as AgCrO4 ?
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