Marianne wants to study the chemical properties of iron. Which would provide the evidence she needs to do this? Marianne could hit the sample with a hammer.

Marianne could observe the sample’s reactivity with moist air.

Marianne could find the mass of the sample by using a balance.

Marianne could find the density of the sample by dividing its mass by its volume.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)

there are no answer choices

step-by-step explanation:

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).

do you have an easier question cause this shh is hard like theheck

step-by-step explanation: