Ackerman and goldsmith (2011) found that students who studied text from printed hardcopy had better test scores than students who studied from text presented on a screen. in a related study, a professor noticed that several students in a large class had purchased the e-book version of the course textbook. for the final exam, the overall average for the entire class was μ = 81.7, but the n = 9 students who used e-book had a mean of m = 77.2 with a standard deviation of s = 5.7. on the basis of these data, can the professor conclude that students using e-books had significantly lower scores than the regular class? use α = .05 with a one-tailed test.

all but the second one

step-by-step explanation:

cuz that one goes over 180

mark brainliest

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

ιт ιѕ $222.95

step-by-step explanation:

αℓℓ уσυ gσт тσ ∂σ ιѕ fιgυяє συт ωнαт 30% σf $318.50 ιѕ $95.55

тнєи ѕυвтяα¢т ιт fяσм $318.50-$95.55=$222.95

нσρє ι ¢συℓ∂ нєℓρ уσυ συ