Total # Posts: 12

algebra
x<-2 or x>1

Pre-calc
Watch your signs! (x^2 -4x+4)-4(y^2 +6y+9)=36+4+36 should be (x^2 -4x+4)-4(y^2 -6y+9)=36+4-36 (x^2 -4x+4)/4-4(y^2 -6y+9)/4=4/4 ((x-2)^2)/4- (y-3)^2 =1 hyperbola, center at (2,3)

Physics
Thank you so much Elena! I forgot to divide 8.8 by two and, of course, kept getting double the answer which I knew was incorrect.

Physics
When violet light of wavelength 415 nm falls on a single slit, it creates a central diffraction peak that is 8.80 cm wide on a screen that is 2.75 m away. How wide is the slit?

Physics
Thank you Elena, I had virtual and inverted also, but the book says it is virtual and upright. so I thought everything else was worry. Maybe it is the book?

Physics
A 2.11 cm high insect is 1.31 m from a -125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?

Physics
When violet light of wavelength 415 nm falls on a single slit, it creates a central diffraction peak that is 8.80 cm wide on a screen that is 2.75 m away. How wide is the slit?

Physics
A 2.11 cm high insect is 1.31 m from a 125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?

Calculus
Chain and quotient rule ((1/2)(2x)(x^2-1)^-1/2)x^2 -2x(x^2-1)^1/2)/x^4 simplifies to (x^3(x^2-1)^-1/2 -2x(x^2-1)^1/2)/x^4 simplifies to (x^2-1)^-1/2(x^2)-2(x^2-1))/x^3 final answer ((x^2-1)^(-1/2))(-x^2+2)/x^3