This yard is a rectangle of dimensions 20 ft x 30 ft. Meaning you have 2 sides of 20 feet and 2 sides of 30 feet. This would be 100 feet, but you are using 30 feet of a building instead of fence on one side. Therefore it is 100 feet - 30 feet. The final answer is 70 feet total.
This statement is false.
Executive orders are subject to judicial review and may be invalidated if they don't have support by the Constitution. The main initiatives require approval by the legislative branch, but executive orders have significant influence over the internal affairs of government, deciding how and to what degree legislation will be applied, dealing with emergencies and waging wars.
Answer:
He was responsible for planning and supervising the invasion of North Africa in Operation Torch in 1942–1943 and the successful invasion of Normandy in 1944–1945 from the Western Front.
I believe it's called a Geiger counter.