Saturday
December 7, 2013

Posts by Katrina

Total # Posts: 190

Calc
If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will the rock hit the...

math
(7+9)+3= 1+(9+5)=

Math
Find the cost function if the marginal cost function is dC/dx=2x-15 and fixed costs are \$75.

Calculus
Find all points at which the graph of f (x) = x^3 −3x has horizontal tangent lines.

Chemistry
I need help writting a formula for: AgNO3(l) + PbNO3(l) + HgNO3(l) + HCl (l)

Chemistry
A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?

Chemistry
3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon? 4. A 1.00 g Sample of C7H603 (s), us completely burned in a bomb calor...

precalculus
Find an angle between o and 2pi that is coterminal with the given angle -8pi/3: 71pi/2: 11pi/7:

precalculus
Write and simplify the difference quotient for the function b(t)= 3t^2-4t+5 over the interval [7,7+h]

Calculus (pleas help I really need to check this)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...

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