Answer: the speed of the elevator is 4.6 miles per hour.
Step-by-step explanation:
Given, The elevator in the Washington Monument takes 75 seconds to travel 506 feet to the top floor.
Since 1 hour = 3600 seconds
⇒ 1 second = hour
⇒ 75 seconds = hour hour
1 mile = 5280 feet
1 feet = mile
506 feet = miles miles
Speed =
Hence, the speed of the elevator is 4.6 miles per hour.
0.7 repeated (little line over the 7)
Answer: x^2-9x+1
x^2-7x-7 d(x-1)
(you would just replace x to (x-1)
(x-1)^2-7(x-1)-7
(solve by square rooting (x-1)(x-1) then foil)
x^2-9x+1
Answer:
9(2.3n+6)+10.45>43.7
(9*2.3n)+(9*6)+10.45>43.7
20.7n+54+10.45>43.7
20.7n+64.45>43.7