This cube would have a surface area of 726 inches squared. To get this you take the cube root of 1331 to get 11. This 11 is a side length so you use it to find the area of a side: 11*11 = 121. Then multiply this 121 by 6 because there are 6 sides to a cube and get 726.
Answer:
A= 153.86
A=49
Step-by-step explanation:
You again....
Directrix is a horizontal line, so the parabola is of the form
<span>(x-h)^2= 4p(y-k) , where (h,k) is the vertex </span>
<span>Coordinates of the focus is (h, k+p) </span>
<span>h = 8 (same as the focus) </span>
<span>k+p = -8 -----(1) </span>
<span>equation of directrix is y=k-p </span>
<span>k-p = -6 ------(2) </span>
<span>from (1) & (2) </span>
<span>2k = -14 </span>
<span>k=-7 </span>
<span>-7+p= -8 </span>
<span>p = -1 </span>
<span>vertex = (8,-7) </span>
<span>(x-8)^2 = -4(y+7) </span>
<span>y+7 = (-1/4) (x-8)^2 </span>
<span>y = (-1/4)(x-8)^2 - 7 is the parabola </span>
<span>What is the equation of the quadratic graph with a focus of (1, 1) and a directrix of y = −1? </span>
<span>Directrix is a horizontal line, so the parabola is of the form </span>
<span>(x-h)^2= 4p(y-k) , where (h,k) is the vertex </span>
<span>Coordinates of the focus is (h, k+p) </span>
<span>h = 1 (same as the focus) </span>
<span>k+p = 1 -----(1) </span>
<span>equation of directrix is y=k-p </span>
<span>k-p = -1 ------(2) </span>
<span>from (1) & (2) </span>
<span>2k = 0 </span>
<span>k=0 </span>
<span>0+p= 1 </span>
<span>p = 1 </span>
<span>vertex = (1,0) </span>
<span>(x-1)^2 = 4(y-0) </span>
<span>(x-1)^2=4y </span>
<span>y = (1/4) (x-1)^2 is the parabola</span>
It is not rational..........
Answer:x= -1/2
Step-by-step explanation: