Tony Stark is playing a word game where he's trying to make 4-letter words by rearranging the letters in the word IRON.
How many unique ways are there to arrange the letters in the word IRON?

The word IRON can be arranged  is 24 unique ways.

Step-by-step explanation:

Given:

The word = IRON

To Find:

The number of unique ways in which the letters in the word IRON can be arranged = ?

Solution:

The number of letters in IRON = 4

The number of positions = 4

In the first position, any one of the 4 letters can be placed

In the second position any one of the remaining 3 letters can be placed

In the third position any one of the remaining 2 letter can be placed

The fourth position can be filled with the left over letter

So the total number of unique way

24

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere