Abbey(Please help)

This page lists questions and answers that were posted by visitors named Abbey(Please help).

Questions

The following questions were asked by visitors named Abbey(Please help).

A point in polar coordinates is given, Find the corresponding rectangular coordinates for the point. (r,Q) = (4, 3pi/2) I know that you are suppose to use x=r cos Q and y=sin Q but I do not know how to plug this in.

A painter working at 100 feet from the ground, drops his paint brush onto the street below. The function, s(t)=-16t^2+100, gives the height(in feet) of the paint brush as it falls to the ground. The velocity at time t=2 seconds is given by lim s(2)-s(t)/2...

I need to give an example of a function with at least one removable and one non-removable discontinuity. I am not to sure how to do this. Please explain! Thanky you

I need to graph the polar equation 3 + 3cosQ and i need to create a table of values for r and Q. Could someone please explain how I would do this? Thank you!

plot the point given in polar coordinates and find the corresponding rectangular coordinates for the point. (-1 , -3pi/4) I do not understand.

Determine whether f is continuous at x=c in the function. Use the 3 conditions of continuity to justify your answer. f(x) = x-1/x+1 c=-1 My answer is not continuous. Am I correct?

The rectangular coordinates of a point are given. Find two sets of polar coordinates for the point. (-3,-3)

When trying to solve arctan(sqrt 567.2 / -459.6) my answer was -2.96. My teacher said that i handled the radical wrong. She said I have to square both numbers, then add them, and then find the square root. I am confused because you cannot take the square...

Write an expression for the most apparent nth term of the sequence. Assume n begins with 1. 3,7,11,15,19 My answer was an= 3 +4n but this wrong.

Find the center, vertices, foci, and eccentricity of the ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 My answer was: center=(2,1) v=(-2,10)(-2,-10) f=(-2,11)(-2,-11) e=11/3 Where did I make a mistake?

Find an equation of the ellipse with its center at the origin. center(0,0) foci(2,0)(-2,0) major axis=8 My answer is x^2/16 + y^2/15 = 1. Is this correct?

I have a TI-83 graphing calculator. How do you graph a polar equation on this calculator. Also how would I graph lim 5/x-2 x-->2 in order to find the limit?

Logs are stacked up in apile as shown in the figure. The top row has 15 logs and the bottom row has 21 logs. How many logs are in the stack? a1= 1+14=15 an= 7+14=21 s1=(n/2)(a1+an) (n/2)(15+21) = 18 How do I figure out the n?

Find the center, vertices, foci, and eccentricity of the ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 I know the center is (2,-1) For the vertices I had (3,-1)(1,-1) and the foci (3.8,-1)(.20,-1) and e = 1.80 but I think these are wrong.

Find the vertex, focus, and directrix of the parabola. x^2 - 2x + 8y + 9 = 0 x^2 - 2x +1 = -8y + 9+ 1 (x-1)^2 = -8(y-1.25) vertex:(1,1.25) focus:(1,-.75) directrix: y=3.25

Find the vertex, focus, and directrix of the parabola. x^2 - 2x + 8y + 9 = 0 x^2 - 2x +1 = -8y + 9+ 1 (x-1)^2 = -8(y-1.25) vertex:(1,1.25) focus:(1,-.75) directrix: y=3.25 My teacher said that I have sign errors. I do not know where I went wrong.

Find an equation of the hyperbola with its center at the origin. vertices:(3,0)(-3,0) Foci (5,0)(-5,0) My answer was x^2/3 - y^2/22 = 1. I do not know how to find a.

Answers

The following answers were posted by visitors named Abbey(Please help).

I am not sure what to change.

so the vertices would be (2, -1+sqrt5/2) (2, -1-sqrt5/2)?

Is this correct?

My teacher said that I had sign errors. I do not see where I went wrong.

Nevermind. I figured it out