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jasenka [17]
3 years ago
13

PLS HELP!! There are 8 lifesavers in a roll and 3 of them are red. What is the probability of opening the roll and the 1st lifes

aver is red? Write as a percent. (Only one end of the roll can be opened)
Mathematics
2 answers:
worty [1.4K]3 years ago
4 0

ANSWER:

Total no. of lifesavers = 8

Red lifesavers = 3

So, Probability of getting red lifesaver are

  • 3/8 or 37.5%

Sati [7]3 years ago
3 0

Answer:

37.5 percent (3/8)

Step-by-step explanation:

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The following six independent length measurements were made (in feet) for a line: 736.352, 736.363, 736.375, 736.324, 736.358, a
horrorfan [7]

Answer:

Assuming population data

\sigma = \sqrt{0.000354}=0.0188

Assuming sample data

s = \sqrt{0.000425}=0.0206

Step-by-step explanation:

For this case we have the following data given:

736.352, 736.363, 736.375, 736.324, 736.358, and 736.383.

The first step in order to calculate the standard deviation is calculate the mean.

Assuming population data

\mu = \frac{\sum_{i=1}^6 X_i}{6}

The value for the mean would be:

\mu = \frac{736.352+736.363+736.375+736.324+736.358+736.383}{6}=736.359

And the population variance would be given by:

\sigma^2 = \frac{\sum_{i=1}^6 (x_i-\bar x)}{6}

And we got \sigma^2 =0.000354

And the deviation would be just the square root of the variance:

\sigma = \sqrt{0.000354}=0.0188

Assuming sample data

\bar X = \frac{\sum_{i=1}^6 X_i}{6}

The value for the mean would be:

\bar X = \frac{736.352+736.363+736.375+736.324+736.358+736.383}{6}=736.359

And the population variance would be given by:

s^2 = \frac{\sum_{i=1}^6 (x_i-\bar x)}{6-1}

And we got s^2 =0.000425

And the deviation would be just the square root of the variance:

s = \sqrt{0.000425}=0.0206

6 0
3 years ago
Is f(x) =8-5x find the value of f(2-k)
serg [7]

Answer:

5k - 2

Step-by-step explanation:

To evaluate f(2 - k), substitute x = 2 - k into f(x), that is

f(2 - k) = 8 - 5(2 - k) = 8 - 10 + 5k = 5k - 2

8 0
2 years ago
"X is the number of red marbles that Tonya has in her hand after she selects four marbles from a bag containing four red marbles
Paladinen [302]

Answer:

Explained below.

Step-by-step explanation:

There are four red marbles (R) and two green marbles (G) in the bag.

The random variable <em>X</em> is defined as the number of red marbles that Tonya has in her hand after she selects four marbles from the bag.

The probability of selecting a red marble is:

P(X)=\frac{4}{6}=0.667

The sample space of <em>X</em> can be defined as follows:

Outcomes: {(RGGG), (RRGG), (RRRG), (RRRR), (RRGR), (RGRR), (GRRR), (RGRG), (GRRG), (RGGR), (GRGR), (GRGG), (GGRG), (GGGR), (GGGG)}

So, the sample space of <em>X</em> is:

S = {0, 1, 2, 3 and 4}

7 0
2 years ago
A crew is shingling a roof. They complete 6.8 square feet every hour. How many square feet will they complete in 12 ½ hours of w
Andru [333]

Answer:

85 square feet

Step-by-step explanation:

what we know: complete 6.8 square feet every hour

what we want to know: how much square feet will be compeletein 12 1/2 hours?

12 1/2 is 12.5

6.8 square feet time 12.5 hours gives you 85 square feet :)

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2 years ago
What is sin 180 degrees?
Firdavs [7]

Answer: The sin 180 degrees is 0.

7 0
3 years ago
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