Wednesday
December 11, 2013

# Posts by Steph

Total # Posts: 302

Math / Inverse Functions
The revenue in dollars of a company selling its products per month is given as, R(x) = 3000x - 20x^2, while the cost in dollars is given by, C(x) = 600x + 4000. Find and simplify P(x), where P(x) is the profit per month.

Math

Math
What is the domain of y = sqrt(5 - x)

Chemistry
Lead has a melting point of 327ºC, its specific heat is J/g•deg, and its molar enthalpy of fusion is 4.80 kJ/mol. How much heat, in kilojoules, will be required to heat a 500.0-g sample of lead from 23.0ºC to its melting point and then melt it?

Chemistry
Lead has a melting point of 327ºC, its specific heat is J/g•deg, and its molar enthalpy of fusion is 4.80 kJ/mol. How much heat, in kilojoules, will be required to heat a 500.0-g sample of lead from 23.0ºC to its melting point and then melt it?

math
Area of a rombus: A=1/2d1d2. Solve for d1

math
the equal signb1=b2 should be b1+b2

math
area of a trapizoid:A==h/2(b1=b2). solve for h dont know how so solve it

Simple Interest Applications
An investor purchased a 91-day, \$100,000 T-bill on its issue date for \$99,326.85. After holding it for 42 days, she sold the T-bill for a yield of 2.72%. a)What was the original yield of the T-bill? b)For what price was the T-bill sold?

math
thanks

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