How many four digit even numbers greater than 4000 can be formed out of the digits 1,2,3,5,6,8,9? a) 840
b) 200
c) 480
d) none of these​

mxb67

step-by-step explanation:

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,