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vesna_86 [32]
3 years ago
12

What is the area of a circle that has the diameter of 4?

Mathematics
2 answers:
OverLord2011 [107]3 years ago
7 0
The answer to this question is A≈12.57
Vikentia [17]3 years ago
3 0

Answer:

Hello! answer: 12.56

Step-by-step explanation:

Area for circles is found be doing

radius × radius × pi since we arent given radius we have to figure it out. But what we do know it diameter is just 2 times the radius so to undo that to find our radius we just do 4 ÷ 2 and 4 ÷ 2 = 2 so 2 is our radius now we will square it which is just fancy for multiply is by itself so 2 × 2 = 4

4 × 3.14 = 12.56 So 12.56 is our area! Hope this helps you!

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Bob bought a bike for $250 and repaired it . He can now sell the bike for $300. What is the percent increase in the value bike ?
alexgriva [62]

Answer:20%

Step-by-step explanation:

250*20%=50

50+250=300

7 0
3 years ago
What is 75 + 15x ≥ 140
melomori [17]
75+ 15x ≥ 140
⇒ 15x ≥ 140-75
⇒ 15x ≥ 65
⇒ x ≥ 65/15
⇒ x ≥ 13/3
⇒ x ≥ 4 1/3

Final answer: x ≥ 4 1/3~
8 0
3 years ago
What is the sum of a geometric sequence 1, 3, 9, ... if there are 12 terms?
attashe74 [19]
We know that
a1=1
a2=3
a3=9
a2/a1=3/1----> 3
a3/a2=9/3----> 3
<span>common ration r is equal to 3
number of terms n  is 12

The </span><span>Sum of geometric series is given by the formula
</span>Sum=a1*[1-r<span>^n]/[1-r]
</span>Sum=1*[1-3^12]/[1-3]-----> Sum=[1-3^12]/[1-3]----> [3^12-1]/[3-1]
<span>Sum=531440/2-----> 265720

the answer is
265720



</span>
4 0
3 years ago
WHAT IS THE ANSWER ?? PLEASE HELP !!
Jlenok [28]

Answer:

B. 43°

Step-by-step explanation:

Internal angles of the triangle are:

  • 180°-90°=90° and
  • 180°-133°= 47°

So It is a right triangle and the missing angle is:

  • p= 90°- 47°= 43°
8 0
3 years ago
Read 2 more answers
Cab u help me find the answer ​
e-lub [12.9K]

Answer:

6

Step-by-step explanation:

3 0
3 years ago
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