Anoted psychic was tested for esp. the psychic was presented with 260 cards face down and was asked to determine if the card was one of 5 symbols: a star, cross, circle, square, or three wavy lines. the psychic was correct in 70 cases. let p represent the probability that the psychic correctly identifies the symbol on the card in a random trial. assume the 260 trials can be treated as an srs from the population of all guesses. to see if there is evidence that the psychic is doing better than just guessing, we test h0: p=0.2 ha: p> 0.2

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

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation:

i saw this question before, dont know the asnwer srry

step-by-step explanation: