Trigonometry
Let N be a 5-digit palindrome. The probability that N is divisible by 4 can be expressed as \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?
Chemistry
I keep getting 5.17 pH. but thats wrong. do I use the equilibrium values to plug into the equation?
Chemistry
Calculate the pH at the equivalence point for the titration of 0.130M methalamine (CH3NH2) with 0.13M Hcl. The Kb of methyl amine is 5.0x10-4.
Education
1. in a study examining preschoolers' responses to their peers distress, researchers used ___ to record each instance in which a child cried, followed by other children's reactions. a. time sampling b. systematic collection c. event sampling d. structured observation 2...
Math
If someone is attached to a 20 ft rope, which is attached to the corner of a building, how far can they move? If the bulding is 22 ft X 15 ft?
inequality
find the solution to the following inequality 2(2x-6)>x+3, then graph the solution.
College Chemistry
A temperature of 20o C is equivalent to approximately
Math
A field trip costs $8.50 per student. If 125 students are going on the trip and a total of $1011.50 has already been collected, how many students have not paid yet?
chemistry
it's octahedral: (ep) F - - F As F - - F Cl
chemistry
it is lower
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