Answer:
13
Step-by-step explanation:
Mean would mean average, which in this case is
so your equation would look like
Next multiply both sides by to clear the fraction
to get
Subtract 69 from both sides
you get
X= 800
Use the equation x+x+200+200=2000
2x+400=2000
-400 -400
—————————
2x=1600
—- ——-
2. 2
—————————-
X=800
Answer:
604.4 cm²
Step-by-step explanation:
Surface area of a cone = πr(r + √h² + r²)
π = 3.14
r = diameter/2 = 13.4 cm/2 = 6.7 cm
h = 21 cm
Surface area of a cone = πr(r + √h² + r²)
= 3.14 * 6.7(6.7 + √21² + 6.7²)
= 21.038(6.7 + √441 + 44.89)
= 21.038(6.7 + √485.89)
= 21.038(6.7 + 22.04)
= 21.028(28.74)
= 604.3 cm²
Surface area of a cone = 604.4 cm²
3.72 x 10^-11
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