A professional climber scaled a building that is 800 meters tall in 8 hours. How long would it take him to climb 250 meters up the building? PLEASE ADD EXPLINATION.

5/2 or 2.5

Step-by-step explanation:

Time taken to scale a building 800m tall = 8 hrs

Time taken to scale a building 1 m tall = hrs

Time taken to scale a building 250 m tall =

                                                                  = 5/2 hrs

                                                                or  = 2.5 hrs

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

25/14 or 1.

step-by-step explanation:

the dots mean that it has infinitely more numbers behind it