All categories

3 years ago

Find the circumference and area of each. Round to nearest tenth:

Mathematics

1 answer:

patriot [66]3 years ago

8 0

№1. Given: r=8 ft, π≈3.14

C=2×π×r=2×3.14×8=50.24=50.2 ft

A=π×r²=3.14×64=200.96=201 ft²

Answer: 50.2 ft; 201 ft²

№2. Given: D=11 cm, π≈3.14

d=2r or r=2/d, so if d is 11 cm, then r is 11÷2=5.5 cm

C=2×π×r=πD=3.14×11=34.54=34.5 cm

A=π×r²=3.14×(5.5)²=94.985=95 cm²

Answer: 34.5 cm; 95 cm²

You might be interested in

50 POINTS !!!!!!!!

Bingel [31]

Answer:

Step-by-step explanation:

i wont tell you the answer but if you use brainly all the time you will not learn how to do it so try hard get a pen or a pencil get paper and stay confident you got this! i belive in you

6 0

3 years ago

Read 2 more answers

What is the remainder in the division problem modeled below

kati45 [8]

It looks like it may be 15 divided by 2.

8 0

3 years ago

Read 2 more answers

I need help I hope it uploaded the pic

jenyasd209 [6]

A number that's bigger than 4.3 is the answer :)

8 0

3 years ago

In order for smallest to largest is 70% 2/3, 0.62,13/20,0.6

Veseljchak [2.6K]

Answer:

duplicate question

brainly.com/question/12103676

8 0

4 years ago

Show that if x and y may both be written as the sum of the squares of two rational integers, then their product xy may also be w

Georgia [21]

Answer:

See proof below

Step-by-step explanation:

One way to solve this problem is to "add a zero" to complete the required squares in the expression of xy.

Let $x=m^2+n^2$ and $y=l^2+k^2$ with $m,n,l,k\in \mathbb{Z}$ . Multiplying the two equations with the distributive law and reordering the result with the commutative law, we get $xy=(m^2+n^2)(l^2+k^2)=m^2l^2+m^2k^2+n^2l^2+n^2k^2=n^2l^2+m^2k^2+m^2l^2+n^2k^2$

Now, note that $0=2lkmn-2lkmn=2nkml-2nlmk$ by the commutativity of rational integers. Add this convenient zero the the previous equation to obtain $xy=n^2l^2-2nlmk+m^2k^2+m^2l^2+2nkml+n^2k^2=(nl-mk)^2+(ml+nk)^2$ , thus xy is the sum of the squares of $nl-mk,ml+nk\in \mathbb{Z}$ .

7 0

3 years ago