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fenix001 [56]
3 years ago
10

What is a equal toCan someone help me calculate a

Mathematics
1 answer:
nignag [31]3 years ago
4 0
Do you by any chance have a traingle ruler 

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C=2nr; if r=4,find c
zhuklara [117]

Answer:

25.13

Step-by-step explanation:

Subtituted 4 for r and multiplied it by pie times 2

8 0
3 years ago
The position of a particle moving along the x-axis is given by s(t)=5t2+3. Use difference quotients to find the velocity v(t) an
leva [86]

Answer:

v(t) = 10t

a(t) = 10

Step-by-step explanation:

The velocity is the derivative of the position.

The acceleration is the derivative of the velocity.

In this problem, we have that:

s(t) = 5t^{2} + 3

Looking at the derivative table, the derivative of a*t^{n} is a*n*t^{n-1} and the derivative of a constant is 0.

So:

v(t) = s'(t) = 10t

a(t) = v'(t) = 10

Your answers are correct.

3 0
4 years ago
I'm burfunkled right now
KiRa [710]

Answer: what grade is this

Step-by-step explanation:

3 0
2 years ago
The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a st
Zepler [3.9K]

Answer:

At least 75% of these commuting times are between 30 and 110 minutes

Step-by-step explanation:

Chebyshev Theorem

The Chebyshev Theorem can also be applied to non-normal distribution. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by 100(1 - \frac{1}{k^{2}}).

In this question:

Mean of 70 minutes, standard deviation of 20 minutes.

Since nothing is known about the distribution, we use Chebyshev's Theorem.

What percentage of these commuting times are between 30 and 110 minutes

30 = 70 - 2*20

110 = 70 + 2*20

THis means that 30 and 110 minutes is within 2 standard deviations of the mean, which means that at least 75% of these commuting times are between 30 and 110 minutes

8 0
4 years ago
What's the basic ratio for 12:42
True [87]

Answer:

Since the simplest form of the fraction 12/42 is 2/7, the simplest form of the ratio 12:42 is also 2:7.

4 0
3 years ago
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