How many 1-1 functions from a set with five elements to a set with 4 elements?

The number is zero

Step-by-step explanation:

From the question we are told to state the number of on-to-one that exist from the set of 5 element to the set 4 element

Generally there are no one-to-one function from a set with a higher number of elements to a set with the lower number of elements

So the correct answer to the question is  there are no one-to-one function from the set of  5 elements to the set of 4 elements

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

step-by-step explanation: