Calculus-PLZ help!
v-u x w-u is a vector perpendicular to the plane containing u,v,w. Divide by its magnitude to get a unit vector uxv•w is the volume desired check u•v u•w v•w for orthogonal
Find the center (h,k) and radius
3x^2+36x+3y^2=0 x^2+12x+y^2=0 (x^2+12x+36) + y^2 = 36 (x+6)^2 + y^2 = 36 hat should make it easy to get the required info.
college algebra i
generally the lesser value is written first -5 < x <= 1 In interval notation, x is in (-5,1]
functions
the sequence 1,3,6,10,... should be familiar. If it's not, remember it; it will show up frequently. y = x(x+1)/2
math
18/60 = 3/10
Math
x^2 = x*x x^3 = x*x*x So, 5^11 = 5*5*5 * 5*5*5*5*5*5*5*5 this illustrates the property that 5^a * 5^b = 5^(a+b) as long as a+b=11, 5^a * 5^b = 5^11
Math
no, 5^6 is not 5^11 However, 5^11 = 5^1 5^10 = 5^2 5^9 = 5^3 5^8 ...
Chemistry
correct
Maths
recall that cos(90+x) = -sin(x) sin^2 + cos^2 = 1 tan = sin/cos
Physical Science
ratio of radii = √(ratio of areas) ratio of forces is inverse of ratio of areas
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