ElectricPavlov

The square prism base is      4 x 4   x   5 ²          ( 5 sides)

Need to find the HEIGHT of the triangles

   Pythag therom    (drop a bisector from the tip the the middle of the sidelength to form a rt triangle)  )

      2 ^2 + h^2 = 6^2

        h^2 = 32

         h = sqrt 32

FOUR triangles   base = 4    height = sqrt 32     area = 1/2 b h

     4 *      1/2  4 * sqrt 32   = 8 sqrt 32 = 45.25   cm²

Now add the reds to finish.......

From Home to the post office = 7/8 + 5/6 mile = 41/24 mile

(41/ 24 + x ) mile   *    18 min/mile   =   42 minutes         x = distance from PO to Freind's crib

      x =    42 /18   - 41/24   =   .625   miles       ( 5/8 mile)

YOU paint  1 fence / 2hr    =   .5 f/hr

Bruh paints  1 fence/3 hr   = .333 f/hr

    when you are finished in 2 hours he still has 1/3 to go

        1/3 fenc / ( .5 f/hr + .333 f/ hr) =    1/3 / .833 = .40 hr        .40  * 60 min/hr = 24 minutes for you both to finish

For AVERAGE SPEED calculations , you have to consider TIME

   because    km run / TIME = average 'speed'

He needs to average   6 km / hour   (his goal)   

   he has run 2 km  @ 12 km/ hr       2km / 12 km/hr = 1 / 6  hr   (10 minutes)

          he has to run the remaining   8 km   in 50 minutes   (5/6 hr)       8 km/ (5/6 hr ) =  48/5  km/ hr     =  9.6   km / hr

EGAD....I had Anti running a 6k race     edited 

   **** add- on ****

                                         81.59% * 25 students ~~~ 20 scores higher than   z - score = -1

Pythagorean theorem

25^2   =   20^2   + w^2

225 = w^2       w = 15 inches wide

Yeppers.....if you calc'd   x and y  properly !     Good work !   

Find the radius of the hemisphere....draw a line form one of the top corners to the middle of the cube face touching the flat face of the hemisphere "

    r = sqrt ( 2^2 + 1^2 + 1^2)   =  sqrt 6

surface area of 1/2 of a sphere   =   1/2   4 pi ^2    =    2 pi (sqrt6)²  =   12 pi  in²     for the curved surface

                                                                                                    PLUS pi r^2  = pi (sqrt6)^2 = 6pi  in²   for the flat surface of the hemisphere

Delta usually means   ' change in'

   as in change in x   per   change in  t       change in t   would be from -3 to 2    so delta t would be   5

                                               then do the same for the coresponding values you found for x

                                                        then just do the math    delta x  divided by delta t

There used to be an 'Off Topic' button.... but people have posted that it is gone ....so now people just post 'Off Topic'   at the beginning of their post.

     Oh...yah....don't change your posts (like you did thisone) after someone has answered them unless you make note of it