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avatar+569 

 

these three questions are very complicated pls help

 Mar 3, 2018
 #1
avatar+18138 
+2

Volume of a sphere is  4/3 pi r^3   =  4/3 (3.14) (4^3)       REMEMBER to use the RADIUS !!

= 267.9 cm^3   

 

The second one:

   You'll have to draw that one out....then break it into squares , rectangles and triangles to calculate the area

 

Then the last one:

 

V = 4/3 pi r^3    =  4/3  * 3.14  *  7.5^3  = 1766.25 in^3

 Mar 3, 2018
 #2
avatar+99736 
+1

Second one

 

The first four points form a parallelogram  with a width of 6   and a height of 4.....so its area  is

(6 * 4)   =  24 units^2

 

The last three points form a triangle with a base of 6  and a height of  2

So...its area is  (base * height) / 2  = 6 * 2  / 2    =    6 units^2

 

So.....the total area  is    (24 + 6)  =  30 units^2

 

 

cool cool cool

 Mar 3, 2018

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