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Phantasy [73]
4 years ago
9

The diameter of a semicircle is 2 kilometers. What is the semicircle's perimeter? Use 3.14 for ​.

Mathematics
1 answer:
Rudiy274 years ago
8 0

Answer:

Perimeter = 3.14 km^2

Step-by-step explanation:

Diameter = 2 , R = 1

Perimeter of semicircle = piR

= 3.14*1

= 3.14 km^2

hope it helps!!

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Express 8 1/5% as a mixed number or a fraction
Alexxandr [17]

Answer:

41/5

Step-by-step explanation:

First we change the 8 and 1/5% to 8.2%

Write the fraction down as a number over one = 8.2/1

Multiply both top and bottom by 10 for every number after the decimal point:

As we have 1 numbers after the decimal point, we multiply both numerator and denominator by 10. So,

8.2/1 = (8.2 × 10)

(1 × 10) = 82/10

Reduce the above fraction by dividing both numerator and denominator by the GCD (Greatest Common Divisor) between them. In this case, GCD (82,10) = 2. So, (82÷2)/(10÷2) = 41/5 when reduced to the simplest form.

As the numerator is greater than the denominator, we have an IMPROPER fraction, so we can also express it as a MIXED NUMBER, thus 82/10 is also equal to 81/5 when expressed as a mixed number.

7 0
3 years ago
How estimation helps you to place the decimal point when multiplying 3.9x5.3
myrzilka [38]
3.9 can be rounded to 4.
5.3 can be rounded to 5.

4 x 5 = 20

That tells you that 3.9 x 5.3 has a digit in the tens place.

Then you can proceed to multiply 39 and 53, which equals 2067.
(Note: I removed the decimals on purpose)

Now we know that in 2067, the 2 should be in the tens place. That means 0 is in the ones place and that 6 is in the tenths place. That leaves 7 to be in the hundreths place.

Therefore, 3.9 x 5.3 = 20.67
3 0
3 years ago
Read 2 more answers
What is parallelogram
ArbitrLikvidat [17]
a four-sided plane rectilinear figure with opposite sides parallel.


step by step
6 0
4 years ago
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I need help with this algebra 2 question, please dont answer if you dont know
Illusion [34]

Answer:

cubic quadratic linear quadratic. first 4 rest i dunno

Step-by-step explanation:

4 0
3 years ago
Mrs. Canale’s class is selling frozen pizzas to earn money for a field trip. For every pizza sold, the class makes $5.35. They h
BabaBlast [244]

Answer: 106

Step-by-step explanation:

First, we can subtract 182.90 from 750, and then divide the answer by 5.35.

750 - 182.90 = 567.10. Mrs. Canale's class still needs to earn 567.10 dollars.

Now we can divide 567.10 by 5.35 to find how many frozen pizzas the class has to sell.

567.10 / 5.35 = 106.

Therefore, Mrs. Canale's class will still need to sell 106 frozen pizzas to meet their $750 goal.

3 0
3 years ago
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