What is the difference between the smallest 5digit number and the largest 4digit number? ​

Help pls with complete solution! (joint and combined variation)1. if x varies jointly as y and z, and x=24, when y=2, and z=3, find x when y=3 and z=5.2.) w varies directly as x and y varies inversely as v^2 and w=1200 when x=4, y=9 and v=6,. find w when x=3, y=12, and v=9.​

What is the value of 8 in 4.08 and 0.08

7√5 + 3 √5= √18 + 3 √8= 5 √3 - 2 √3= 10 √2 - √50=