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kompoz [17]
3 years ago
9

Why is pi day celebrated on march 14th

Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
7 0
Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant.
White raven [17]3 years ago
3 0
Pi is approximately 3.14 and
 
March 14 is 03.14 
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Find the surface area of each figure (spheres and hemispheres)
xenn [34]

Answer:

7. 1520.53 cm²

8. 232.35 ft²

9. 706.86 m²

10. 4,156.32 mm²

11. 780.46 m²

12. 1,847.25 mi²

Step-by-step explanation:

Recall:

Surface area of sphere = 4πr²

Surface area of hemisphere = 2πr² + πr²

7. r = 11 cm

Plug in the value into the appropriate formula

Surface area of the sphere = 4*π*11² = 1520.53 cm² (nearest tenth)

8. r = ½(8.6) = 4.3 ft

Plug in the value into the appropriate formula

Surface area of the sphere = 4*π*4.3² = 232.35 ft² (nearest tenth)

9. r = ½(15) = 7.5 m

Surface area of the sphere = 4*π*7.5² = 706.86 m² (nearest tenth)

10. r = ½(42) = 21 mm

Plug in the value into the formula

Surface area of hemisphere = 2*π*21² + π*21² = 2,770.88 + 1,385.44

= 4,156.32 mm²

11. r = 9.1 m

Plug in the value into the formula

Surface area of hemisphere = 2*π*9.1² + π*9.1² = 520.31 + 260.15

= 780.46 m²

12. r = 14 mi

Plug in the value into the formula

Surface area of hemisphere = 2*π*14² + π*14² = 1,231.50 + 615.75

= 1,847.25 mi²

8 0
3 years ago
Which of the following expressions results in 0 when evaluated at x = 4?
Naily [24]
A).(x - 10) X (x - 4)
    (4 - 10) X (4 - 4)
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7 0
3 years ago
Read 2 more answers
Leon's older brother is 4 3/4 feet tall. Leon is 1/3 foot shorter than his brother. How tall is Leon?
galben [10]
Wouldnt it be 4 2/4 feet tall?
3 0
3 years ago
Emma bought 16 packages of rolls for a party.there were 12 rolls in a package. After the party there were 8 roll left over. How
TiliK225 [7]
Well 16x12=192 then subtract it by 8 and 184 rolls were eaten! OMG
3 0
3 years ago
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Enter the value for x that makes the given equation true.10x-7(3x+8)=-26x+4
mylen [45]

10x-7(3x+8)=-26x+4​

first you have to isolate the variable

then you divide each side by factores that don't contain the vairable

for this problem if you follow those steps

X=4

-7(3x+8)=-36x+4

-11(3x+8)=-36x+4

3 0
1 year ago
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