Please help this is a very important test for me. Andrea is a very good student. The probability that she studies and passes her mathematics test is 17/20. If the probability that Andrea studies is 15/16, find the probability that Andrea passes her mathematics test, given that she has studied.

68/75 or .907

Step-by-step explanation:

"P(studies and passes)= 17/20

P(studies) = 15/16

P(passes/studies) = x

P(studies and passes) = P(studies) x P(passess/studies)

17/20 = 15/16 x X

68/75 or .907"

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

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.