A pyramid is made of metal balls. The lowest layer consists of 4*4 balls, the next layers of 3*3 and 2*2 , and one ball at the top. Every two balls that touch each other are connected with a screw. How many screws are used to build this pyramid? a 72 b 85 c 88 d 92 e 96

Question
A pyramid is made of metal balls. The lowest layer consists of 4*4 balls, the next layers of 3*3 and 2*2 , and one ball at the top. Every two balls that touch each other are connected with a screw. How many screws are used to build this pyramid? a 72 b 85 c 88 d 92 e 96
Answer:
A pyramid is made of metal balls. The lowest layer consists of 4*4 balls, the next layers of 3*3 and 2*2 , and one ball at the top. Every two balls that touch each other are connected with a screw. How many screws are used to build this pyramid? a 72 b 85 c 88 d 92 e 96 65105670ea16c.webp
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algebra 11 months ago 2153