PLEAE HELP WILL GIVE YOU BRAINLIEST. Simplify 3
\sqrt{x} " alt=" \sqrt{x} " align="absmiddle" class="latex-formula">5 - 2
7 + 45 - 28
1 answer:
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Step-by-step explanation:
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- No of protons=Atomic No=17
- No of electrons=No of protons=17
- No of neutrons=Massno-No of protons
Answer:
82.8 in²
Step-by-step explanation:
The surface area a triangular based pyramid :
Base area + 1/2(perimeter * slant height)
Base = 8 inches ; Slant height = 4.6 inches ; altitude of base measure = 6.9 inches
Base area of triangle :
1/2 * base * height
1/2 * 8 * 6.9
4 * 6.9
Base area = 27.6 in²
The perimeter, P = sum of sides ; (s1 + s2 + s3
P = 8 + 8 + 8 = 24 in
Hence,
Surface area = 27.6 in² + 1/2(24*4.6)
Surface area = 27.6 in² + (12 * 4.6) in²
Surface area = (27.6 + 55.2)
Surface area = 82.8 in²
