What is the negation of the following: "if r is rational then the decimal expansion of r is repeating."

a. r is rational or the decimal expansion of r is repeating.
b. if r is rational then the decimal expansion of r is repeating.
c. r is rational and the decimal expansion of r does not repeat.
d. r is rational or the decimal expansion of r does not repeat.
e. if the decimal expansion of r is repeating then r is rational.
f. r is rational and the decimal expansion of r is repeating.
g. if the decimal expansion of r does not repeat then r is irrational.
h. r is irrational or the decimal expansion of r is repeating.
i. if r is irrational then the decimal expansion of r is repeating.
j. r is irrational and the decimal expansion of r is repeating.
k. if r is irrational then the decimal expansion of r does not repeat.

step-by-step explanation:

ask goog great chance of finding the solution there

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.