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2 years ago

I need help with this questions

Mathematics

1 answer:

kaheart [24]2 years ago

6 0

Answer:

1st question

63.63

2nd question

28.3

3rd question

25.1

4th question

70.4

5th question

1404.93

Step-by-step explanation:

area= π×r^2

3.142×4.5squared

radius is 4.5

4.5 squared is 20.25

20.25×3.142 is 63.6255

2.d.p is 63.63

circumference is pi times diameter

3.142×9 is 28.278

1.d.p is 28.3

4×2=8 (diameter)

circumference is pi times diameter

3.142×8=25.136

1.d.p=25.1

11.2×2=22.4(diameter)

circumference is pi times diameter

3.142×22.4=70.3808

1.d.p=70.4

area is pi times radius squared

radius=11.2

11.2 squared is 125.44

3.142×125.44=1404.928

2.d.p=1404.93

hope this helps!

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