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4 years ago

What is the ratio of the two quantities? Warning: different units! a 4 seconds to 2 min

Mathematics

1 answer:

lesya692 [45]4 years ago

8 0

Answer:

Step-by-step explanation:

4sec:2min

2min=120sec

4:120

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An SRS of 27 students at UH gave an average height of 5.6 feet and a standard deviation of .1 feet.Construct a 90% confidence in

Juliette [100K]

Answer:

Option a) [5.567, 5.633]

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 5.6 feet

Sample size, n = 27

Alpha, α = 0.10

Sample standard deviation, s = 0 .1 feet

90% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 26 and}~\alpha_{0.10} = \pm 1.7056$

$5.6 \pm 1.7056(\displaystyle\frac{0.1}{\sqrt{27}} ) = 5.6 \pm 0.0328 = (5.5672 ,5.6328) \approx (5.567,5.633)$

Option a) [5.567, 5.633]

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3 years ago

I'm having g a hard time with this, anyone please care to solve it for me? I would highly appreciate it.

Damm [24]

Answer:

43 46 34 98 78 67

Step-by-step explanation:

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3 years ago

Solve the system of equations.<br> – 7x – 10y = 45<br> -3x - 5y = 25<br> x =<br> Y =

irina [24]

Answer:

The solution is (-5, -2).

Step-by-step explanation:

We'll use "elimination by addition and subtraction."

Multiply the second row by -2. Our system

– 7x – 10y = 45

-3x - 5y = 25

becomes:

– 7x – 10y = 45

+6x + 10 y = -50

-------------------------

-x = 5, so that x = -5.

Substituting -5 for x in the second equation results in

-3(-5) - 5y = 25, or 15 - 5y = 25. This reduces to

-5y = 10, so that y must be -2.

The solution is (-5, -2).

4 0

3 years ago

Help please !!! At a local Brownsville play production, 420 tickets were sold. The ticket prices varied on the seating

Radda [10]

Answer:

n = 12$ x = 8$ y = 10$ where n, x, and y are number of tickets

12 n + 8 x + 10 y = 3920 and n + x + y = 420

12n + 8 (x + y) + 2 y = 3920

12 n + 8 (5 n) + 2 y = 3920 since 5 (x + y) = n

52 n + 2 y = 3920 or y = 1960 - 26 n

Also, n + x + y = 420 or n + 5 n = 420 since x + y = 5 n

n = 70 so 70 of the $12 were sold

And since y = 1960 - 26 n we have y = 140 tickets

Now 12 * 70 + 8 x + 140 * 10 = 3920

This gives x = 210 tickets

Check: 210 + 140 + 70 = 420 tickets

Also, 12 * 70 + 210 * 8 + 140 * 10 = 3920

7 0

3 years ago

What is the area of the circle below if it is 18 m

DiKsa [7]

Answer:

A≈1017.88 if r=18m or A≈254.47 if r=9

Step-by-step explanation:

A=Pi*r^2, plugging in 18 m or 9 m since lack of info but i assume you are giving 18m total length of circle, gives us answer.

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4 years ago