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Lady bird [3.3K]
2 years ago
14

Find the circumference of circle if the diameter is 7.8cm​

Mathematics
1 answer:
olasank [31]2 years ago
4 0

Answer:

24.5

Step-by-step explanation:

the radius is half of a diameter

so the radius is 3.9

24.5 = 2πr= 2 * π * 3.9 ≈ 24.504

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lilavasa [31]
The answer would have to be B because of the pi.
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3 years ago
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What solid figure has 4 faces 6 vertices
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I don't think there is one. A triangular pyramid has 4 faces and 4 vertices, and a <em>square pyramid</em> has 4 faces and 5 vertices;
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Irina wants to build a fence around a rectangular vegetable garden so that it has a width of at least 10 feet. She can use a max
Rasek [7]

Answer:

In option a, w < 10

in option b, w = 10 and 2(20) + 2(10) = 40 + 20 = 60 < 150

in option c, w > 10 but 2(60) + 2(20) = 120 + 40 = 160 > 150

In option d, w > 10 but 2(55) + 2(30) = 110 + 60 = 170 > 150

Therefore the corect answer is option b.

Step-by-step explanation:

7 0
3 years ago
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What is the sum of three tenths plus thirty nine hundredths equals blank a thirty six hundredths b forty two hundredths c sixty
ad-work [718]

Answer:c- sixty nine hundredths

Step-by-step explanation:

three tenths can be expressed in decimal as 3/10

thirty nine hundredths can be expressed in decimal as 39/100

Therefore the sum of three tenths plus thirty nine hundredths equals

3/10 +39/100

We first find the l.c.m of the two fractions equals 100 so we have 100 as the denominator

then 100 divided by 10  multiplied by 3 +100 divided by 100 multiplied by 39 as illustrated below gives the answer

3/10 +39/100

=30+39/100

=69/100= sixty nine hundredths

3 0
2 years ago
Anna needs to save $85 for a yoga class. She has already saved $42. How much more does Anna need to save?​
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85-42= $43
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