When two lights blink in alternation close together, we perceive one light moving back and forth if the time between blinks is short. We want to know the longest interval of time between blinks that preserves this illusion of motion? We ask subjects to turn a knob that slows the blinking until they "see" two lights rather than one light moving. A report gives the results in the form "mean plus or minus the standard error of the mean." Data for 20 subjects are summarized as 259±45 (in milliseconds). What are x¯¯¯ and s for these subjects? (This exercise is also a warning to read carefully: that 259±45 is not a confidence interval, yet summaries in this form are common in scientific reports.)

idk

step-by-step explanation:

use that smart brain

2/3

step-by-step explanation:

the slope of a line is equal to the rise/run. in this case the line rises 2 units for every +3 units it moves

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105