If the average person can climb 7 stairs every 10 seconds, taking a 60 second break after each time they have climbed 455 stairs, how long in hours would it take to climb all the stairs in Burj Khalifa?

12/11c

or

12

c

11

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

hi! i think the answer is 1/2 : )

i think the answer is b