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BARSIC [14]
3 years ago
13

What is the circumference of a circle whose radius is 20 feet? Leave answer in terms of π.

Mathematics
2 answers:
kvv77 [185]3 years ago
6 0
Circumfrence=2pir
2pi(20)
40pi
C
lutik1710 [3]3 years ago
5 0

Answer:

C) 40π feet

Step-by-step explanation:

The formula for circumference is C = πd. Since the radius is 20 feet, the diameter is 40 feet, and the circumference is 40π feet.

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I need help with this​
guapka [62]

Answer:

A: Fraction = 11/16 of an inch. Decimal = .6875 inch

B: Fraction = 2 1/2 inch. Decimal = 2.5 inch

Step-by-step explanation:

Each inch is divided by 16ths on the ruler. Count where the measured values lay on the ruler. Once you find the fraction you can divide the fraction to find the decimal answer.

5 0
3 years ago
I need help with this.
Dimas [21]
0.5-2(0)^2
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3 years ago
Read 2 more answers
Need help with all parts please show you work for each part
bezimeni [28]
Vinegar is the x or horizontal oil is the y or vertical
\frac{3}{2}  =  \frac{y}{x}  \\ 3x = 2y \\ y =  \frac{3}{2} x
the point represent the amount of vinegar and oil so for 1 tbsp vinegar you need 1.5tbsp oil
4 0
2 years ago
Urgent. There are 12 coloured counters in a bag. The counters are black, white or grey A counter is chosen at random. The probab
Nastasia [14]

Answer:

1/12

Step-by-step explanation:

<u>Needed information</u>

\sf Probability\:of\:an\:event\:occurring = \dfrac{Number\:of\:ways\:it\:can\:occur}{Total\:number\:of\:possible\:outcomes}

The sum of the probabilities of all outcomes must equal 1

<u>Solution</u>

We are told that the probability that the counter is <em>not</em> black is 3/4.  

As the sum of the probabilities of all outcomes <u>must equal 1</u>, we can work out the probability that the counter <em>is </em>black by subtracting 3/4 from 1:

\sf P(counter\:not\:black)=\dfrac34

\implies \sf P(counter\:black)=1-\dfrac34=\dfrac14

We are told that the probability that the counter is <em>not </em>white is 2/3.  

As the sum of the probabilities of all outcomes <u>must equal 1</u>, we can work out the probability that the counter <em>is </em>white by subtracting 2/3 from 1:

\sf P(counter\:not\:white)=\dfrac23

\implies \sf P(counter\:white)=1-\dfrac23=\dfrac13

We are told that there are black, white and grey counters in the bag.  We also know that the sum of the probabilities of all outcomes must equal 1.  Therefore, we can work out the probability the counter is grey by subtracting the probability the counter is black and the probability the counter is white from 1:

\begin{aligned}\sf P(counter\:grey) & = \sf1-P(counter\:black)-P(counter\:white)\\\\ & =\sf 1-\dfrac14-\dfrac13\\\\ & = \sf \dfrac{12}{12}-\dfrac{3}{12}-\dfrac{4}{12}\\\\ & = \sf \dfrac{12-3-4}{12}\\\\ & = \sf \dfrac{5}{12}\end{aligned}

7 0
2 years ago
What is the ratio of 40cm and 18mm
snow_tiger [21]
40 cm = 400 mm, so 400 mm / 18 mm = 200:9, or 22.22:1.
5 0
2 years ago
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