Hi! need desperately! the area of a triangle sign is 81 ft^2. if the base of the sign is 18 feet, what is the height of the sign?

Area of a triangle: 1/2 base x height

81 ft^2 = 1/2 (18 feet) (height)

Solve for x

81 / (1/2 x 18) = 9 feet for height

Please brainliest me if this helped; trying to level up!

It should be 9 for the height

ans789

step-by-step explanation:

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.