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Korvikt [17]
3 years ago
7

Which of the following choices is the standard deviation of the sample shown

Mathematics
1 answer:
frozen [14]3 years ago
7 0

Answer:

Mean = (19 + 20 + 21 + 22 + 23)/5 = 105/5 = 21

x    x - mean   (x - mean)^2

19     -2                4

20     -1                1

21      0                0

22      1                1

23      2                4

              Sum = 10

Step-by-step explanation:

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David likes to enter bike races on weekends. He can bike 42 ½ miles in 2 ½ hours. How many miles can he ride in just one hour? g
Rudiy27

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Step-by-step explanation:

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3 years ago
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If a spinner for a game is spun once, there is a 25% chance it will land on
bonufazy [111]

Answer:

Pr = 0.6

Step-by-step explanation:

Given

Let

O \to Orange

So:

P(O) = 25\% --- probability of O

n=2 --- Number of spin

Using the complement rule, the probability that a spin will not land on orange is:

P(O') = 1 - P(O)

P(O') = 1 - 25\%

Express as decimal

P(O') = 1 - 0.25

P(O') = 0.75

On two spins, the probability that it will not land on orange is:

Pr = P(O') * P(O')

So, we have:

Pr = 0.75* 0.75

Pr = 0.5625

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2 years ago
The measure of one of the acute angles in a right triangle is given. what is the measure of the other angle?
yuradex [85]
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2 years ago
The fraction 5/8 is located between what two fractions?
S_A_V [24]
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3 years ago
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A baby bird jumps from a tree branch and flutters to the ground. The function "f" models the bird's height (in meters) above the
AURORKA [14]

The answer to this question will depend on the function f itself. Basically you will find the height in meters above the ground of the bird when it jumped when the time t=0s. This is substsitute every t in the function for a value of zero and that way you will get the bird's height at the time it jumped. If you were given a graph for this function, you can find the y-intercept of the graph and that will be the answer as well. The question could be written like this:

A baby bird jumps from a tree branch and flutters to the ground. The function "f(t)-4.9t^{2}+25" models the bird's height (in meters) above the ground as a function of time (in seconds) after jumping. What is bird's height above the ground when it jumped.

Answer:

25m

Step-by-step explanation:

Once your function is given, you can substitute t=0 since 0s is the time measured at the moment the bird jumped. So our function will be:

f(0)=-4.9(0)^2+25

f(0)=25m

So the height of the bird above the ground when it jumped is 25m in this particular function.

8 0
3 years ago
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