A researcher compares differences in positivity between participants in a low-, middle-, or upper middle–class family. If she observes 15 participants in each group, then what are the degrees of freedom for the one-way between-subjects ANOVA?

b

step-by-step explanation:

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a

i believe it’s 165 because if u add 137 and 58 u get 195 and then subtract that from 360 and there’s ur answer