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Fittoniya [83]
2 years ago
12

How to find radius.

Mathematics
2 answers:
andre [41]2 years ago
6 0

Answer:

21 cm

Step-by-step explanation:

To find the radius, half the diameter (42cm)

hope this helps :)

Kitty [74]2 years ago
6 0
21cm because the radius is always half of the diameter
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What's the pattern for 1,3,5,7,5,3,1,3
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+2,+2,+2,-2,-2,-2,+2,+2,+2 etc
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3 years ago
A weather reporter in your area said that the speed of sound in air today is about one thousand one hundred feet per second. Wha
stira [4]

Answer:

The speed in scientific notation is (1.1)(10^{3}) feet per second.

Step-by-step explanation:

1. You have the following speed: One thousand one houndred feet per second.

2. You must convert from words to number. This is:

1,100 feet per second

3. To express this quantity in scientific notation, you can move the decimal point three places to the left, and write it as: 1.1 by 10^{3} (or 1,000) as following:

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5 0
3 years ago
If mn = 16 and m^2 + n^2 = 68 then (m+n)^2 =
Dima020 [189]

Answer:

B.   100

Step-by-step explanation:

(m + n)^2

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Rearrange

(m^2 + n^2) + 2mn

Substitute

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= 68 + 32

= 100

7 0
2 years ago
Which ordered pairs make both inequalities true? Check all that apply.
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8 0
3 years ago
Read 2 more answers
Out of 30 questions, Ahmad answer 12 of them incorrectly. What percent of the questions did he answer correctly?
kati45 [8]
First, you would need to determine how many questions he got correct. 
30 - 12 = 18

Next, you would need to create an equation for this problem. Let x represent the unknown percentage. 
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Now, you would cross multiply. 
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The last step would be to isolate the x. To do this, you would divide both sides of the equal sign by 30. 
x = 60

Ahmad got 60% of the questions correct. 

I hope this helps!
7 0
3 years ago
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