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timofeeve [1]
2 years ago
7

Ryan keeps his loose change in a milk jug. The jug contains 25 pennies, 15 nickels, 15 dimes, and 5 quarters. If Ryan shakes out

one coin, what is the probability the coin will NOT be a dime? A 75% B 50% C 25% D 66 2/3%
Mathematics
1 answer:
ahrayia [7]2 years ago
8 0

Answer: god

Step-by-step explanation: god is always right

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$3 is what percent of $4?
ozzi

Answer:

The answer is 3/4 = 75%

Step-by-step explanation:

3/4 = 75%

It is: 3/4 = 75%

4 0
3 years ago
The amount of lateral expansion (mils) was determined for a sample of n = 8 pulsed-power gas metal arc welds used in LNG ship co
Alona [7]

Answer:

95% Confidence interval for the variance:

3.6511\leq \sigma^2\leq 34.5972

95% Confidence interval for the standard deviation:

1.9108\leq \sigma \leq 5.8819

Step-by-step explanation:

We have to calculate a 95% confidence interval for the standard deviation σ and the variance σ².

The sample, of size n=8, has a standard deviation of s=2.89 miles.

Then, the variance of the sample is

s^2=2.89^2=8.3521

The confidence interval for the variance is:

\dfrac{ (n - 1) s^2}{ \chi_{\alpha/2}^2} \leq \sigma^2 \leq \dfrac{ (n - 1) s^2}{\chi_{1-\alpha/2}^2}

The critical values for the Chi-square distribution for a 95% confidence (α=0.05) interval are:

\chi_{0.025}=1.6899\\\\\chi_{0.975}=16.0128

Then, the confidence interval can be calculated as:

\dfrac{ (8 - 1) 8.3521}{ 16.0128} \leq \sigma^2 \leq \dfrac{ (8 - 1) 8.3521}{1.6899}\\\\\\3.6511\leq \sigma^2\leq 34.5972

If we calculate the square root for each bound we will have the confidence interval for the standard deviation:

\sqrt{3.6511}\leq \sigma\leq \sqrt{34.5972}\\\\\\1.9108\leq \sigma \leq 5.8819

6 0
3 years ago
Cards are dealt, one at a time, from a standard 52-card deck. a if the first 2 cards are both spades, what is the probability th
ratelena [41]
So we already drew two cards and both of them are spades. So that means there are 50 cards and 11 spades left.

Then third card being spades would be 11 / 50

Now there are 10 spades and 49 cards left.
So the probability for fourth card would be 10 / 49

Fifth card would be 9 / 48.

So the probability of next three cards being spades would be
\dfrac{11}{50}\cdot\dfrac{10}{49}\cdot\dfrac9{48}=\dfrac{33}{3920}\approx\boxed{0.00842}

Hope this helps.
3 0
3 years ago
Given a graph for the transformation of f(x)=f(kx), determine the k value
jarptica [38.1K]

Answer:

  • B. k = 1/3

Step-by-step explanation:

Compare any two points on same horizontal line.

<u>The easy one is:</u>

  • f(-3) = g(-1) = - 3

<u>Since g(x) = f(kx), substitute the x- coordinates to find the value of k:</u>

  • - 1 = k*(-3)
  • k = - 1/ - 3
  • k = 1/3

Correct choice is B

4 0
2 years ago
What is the ratio of the sides of triangle ABY<br> NEED HELP ASAP
Oksi-84 [34.3K]
The answer is 1 : 1 : square root of 3
3 0
3 years ago
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