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4 years ago

What is the MAD for 4,5,6,1? Please help I am really confused!

Mathematics

2 answers:

marysya [2.9K]4 years ago

7 0

Answer:

Step-by-step explanation: The mad is 1.5

Hunter-Best [27]4 years ago

5 0

Answer:

MAD = 1.5.

Step-by-step explanation:

MAD is the Mean Absolute Deviation.

The MAD is a measure of the spread of the data.

The mean of these numbers is (1 + 4 + 5 + 6) / 4

= 16/4 = 4.

Now you subtract this from the individual values and take the absolute values:

1 - 4 = -3 (absolute value = 3).

4-4 = 0

5-4 = 1

6-4 = 2.

Adding 0+1+2+3 = 6.

The MAD = 6 / 4 = 1.5.

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Barney was driving at 25 mph. A car pulls out 30 ft ahead of him. The coefficient of friction, f, is 0.7. Which statement is tru

tankabanditka [31]

Answer:

B Barney stops less than a foot from the car.

Step-by-step explanation:

From the information given:

The initial speed of barney $v_o$ = 25 mph

Coefficient of friction $\mu$ = 0.7

Recall that

1 mph = 0.447 m/s

Then

$v_o$ = 25 × 0.447 m/s

$v_o$ = 11.175 m/s

The force of friction acting on the barney is expressed as:

$F = \mu N \\ \\ F = \mu mg$

$ma = \mu mg$

$a = \mu g$

a = 0.7 × 9.8 m/s

a = 6.86 m/s²

Since the force acts in an opposite direction to the motion of Barney, Thus the acceleration must also be negative.

a = -6.86 m/s²

Now;

Suppose Barney stops after traveling a distance (s), so that the final speed is zero.

Then;

Using the kinematic equation;

$v^2 - v_o^2 = 2as$

$0 - (11.17)^2 = 2 \times (-6.86) s$

$-124.76 = -13.72 s$

$s = \dfrac{124.76}{13.72}$

s = 9.09 m

Recall that;

1 m = 3.28 ft

So;

s = 9.09 m = 9.09 × 3.28 ft

s = 29.81 ft

∴

The distance traveled by the Barney is 29.81 ft which implies that Barney stops less than a foot from the car.

7 0

3 years ago

A political analyst found 43% of 300 randomly selected republican voters feel that the federal government has too much power. Fi

Genrish500 [490]

Answer:

Step-by-step explanation:

We want to determine 95% confidence interval of the population proportion of republican voters who feel that the federal government has too much power.

43% of 300 randomly selected republican voters feel that the federal government has too much power. This means that

p = 43/100 = 0.43

q = 1 - p = 1 - 0.43 = 0.57

n = 300

mean, u = np = 300 × 0.43 = 129

Standard deviation, s = √npq = √129×0.57 = 8.575

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

129 +/- 1.96 × 8.575/√300

= 129 +/- 0.9704

The lower end of the confidence interval is 129 - 0.9704 =128.0296

The upper end of the confidence interval is 129 + 0.9704 =129.9704

Therefore, with 95% confidence interval, the mean of the population proportion of republican voters who feel that the federal government has too much power is between 128.0296 and 129.9704

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4 years ago

Which functions have a removeable discontinuity? Check all that apply.

Romashka [77]

Answer:

1,3,4

Step-by-step explanation:

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3 years ago

I need help with this question please look at the picture attached

Katarina [22]

Answer:

i think its 1.42857143/6

Step-by-step explanation:

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3 years ago

Which is bigger 12 or -12

FinnZ [79.3K]

Answer:

Step-by-step explanation:

12>0>-12

7 0

3 years ago