Tuesday
December 10, 2013

# Posts by kristi

Total # Posts: 122

Algebra
The number of medical doctors D (in thousands) in the United States from 1998 through 2006 can be modeled by D = 431.61 + 121.8t, 8 ¡Â t ¡Â 16 where t represents the year, with t = 8 corresponding to 1998.¢Ó (a) In which year did the number ...

Algebra
square roots to replace the a's

Algebra
I'm sorry I wrote the equation wrong 3ã(x+1)-ã(7x+8)=1

Algebra
square root>(3x + 1)− square root>(7x + 8)= 1

Algebra
x^3 + 6x^2 + 5x + 30 = 0

Physics
Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in seconds), as the model f...

Physics
An open box with a square base (see figure) is to be constructed from 160 square inches of material. The height of the box is 3 inches. What are the dimensions of the box? (Hint: The surface area is S = x2 + 4xh.) 1 . in. (length) × 2 . in. (width) × 3 . in. (height)

Algebra
The floor of a one-story building is 14 feet longer than it is wide (see figure). The building has 1472 square feet of floor space. a) Write a quadratic equation for the area of the floor in terms of w. (b) Find the length l and width w of the floor.

science
when you want to pull downward to lift something, the main advantage of passing a rope upward and through a single pulley, rather than just up over the branch of a tree, is that the pulley does what?

Chemistry
A)How many moles of O2 are required for the complete combustion of 2.2 g of C3H8 to form CO2 and H2O? b)A 65.25 g sample of CuSO4•5H2O (M = 249.7) is dissolved in enough water to make 0.800 L of solution. What volume of this solution must be diluted with water to make 1.0...

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