Find the number of permutations of the first 9 letters of the alphabet, taking 4 letters at a time. 4280 3024 2512 1015

3024

Step-by-step explanation:

The combinations to find the number of permutations of the first 9 letters of the alphabets, taking 4 letters at one time, are given by:

Here in this case,

n = 9 (the total number of letters);and

k = 4 (the numbers of letters taken at one time)

Therefore, the number of permutations of the first 9 letters of the alphabets is 3024.

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

a

step-by-step explanation: