# Posts by amaa

Total # Posts: 14

**precalculus**

A pilot flies in a straight path for 2 h 30 min. She then makes a course correction, heading 7 degrees to the right of her original course, and flies 3h in the new direction. If she maintains a constant speed of 695 mi/h, how far is she from her starting position?

*December 4, 2012*

**precalculus**

Find the focus, directrix, and focal diameter of the parabola. x = −4y2 I answered everything right except the directrix. which my ans was -1/16.

*December 1, 2012*

**precalculus**

Find the focus, directrix, and focal diameter of the parabola. 9x + 7y2 = 0 my answers were focus = -9/28,0 fd =9/7 directrix= -9/28 (this ans. is incorrect) what am I missing? pls help

*December 1, 2012*

**biochemistry**

discuss at least six factors affecting the performance of an enzyme. Thank you.

*December 1, 2012*

**precalculus**

Find all solutions of the system of equations. (If there is no solution, enter NO SOLUTION.) 4x^2− 27y^3 = 35 8x^2+54y^3= 74

*December 1, 2012*

**precalculus**

Find all solutions of the system of equations. Order your answers from smallest to largest x, then from smallest to largest y.) x^2 + y2= 53 x2− y2= 3

*December 1, 2012*

**precalculus**

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. tan θ = − sqrt 3/3

*November 30, 2012*

**math**

thanks I got it right.

*November 30, 2012*

**math**

Find the vertices, foci and eccentricity of the ellipse.Thank you 9x^2 + y^2 = 81

*November 30, 2012*

**math**

Find the vertices, foci, and eccentricity of the ellipse. 64x^2 + 81y^2 = 5184

*November 30, 2012*

**math**

Find the vertices, foci, and eccentricity of the ellipse. Thank you. x^2/16 + y^2/25 = 1

*November 30, 2012*

**math**

Find the values of the trigonometric functions of t if tan t= 3 and the terminal point of t is in quadrant III.

*November 29, 2012*

**math**

A tree on a hillside casts a shadow 200 ft down the hill. If the angle of inclination of the hillside is 23 to the horizontal and the angle of elevation of the sun is 54, find the height of the tree. Please round the answer to the nearest integer.

*November 29, 2012*

**geophysical science**

i think the displacement will be zero because you went back so you displaced but back to your normal position. but i am not sure of the distance traveled.

*June 8, 2010*

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