The tallest masonry building in the world is City Hall in Philadelphia (as of April 2019). If you're standing on the street 1,300 feet from the bottom of the building, you have to look up at a 23 degree angle to see the top. How tall is the building?​

CL.1.142):

A):      

x5 ==>      4 boxes  =   3ft   < x5

20 boxes   =       ?  ft

20 boxes  is    15 ft. high

B):   x3  ===>   4 boxes     =    3ft.  < x3

   ?   boxes           =          9ft.

       12 boxes  will fit in one stack.

c):  CL.143

 Perimeter  =     15  +  29  +  9  +  11  +  6  +  18   >  88m

A1    =    b  *   h

(18)(15)  

270m^2

A2    =   b  *  h

(11)(9)

99

Total  Area >   270    +    99   >  369m^2

CL.1-144

1/4    +   1/4   +   1/5     =    5/20    +   5/20   +   4/20    >    14/20

1/4  *    5/5  >  5/20

1/5   *    4/4    >  4/20

14/20      +      ?/20       =      20/20

?      =       6  Missing    Section

6/20      >     3/10

CL-1.145

A):   40/100       =     4/10   >   2/5

0.4            >    40%

B):    1/6  >   .00000

0.16 (Repeating 6)  >  16.6%

C):   37.5/100     =    375/1000     >     3/8

0.375      >   37.5%

CL-1.146

ADD:   1/6   +   1/2   show all steps:

1/6   +   1/2

1/6    +    3/6

1   +   3 / 6

4/6  >    2/3     >   Decimal:   >   0.666667

Hope that helps                                   : )