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agasfer [191]
3 years ago
12

Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use trainin

g wheels. It was revealed that they used them an average of six months with a sample standard deviation of three months. Assume that the underlying population distribution is normal.

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Answer:

CI = 3.931 < μ < 8.069

Step-by-step explanation:

Hello !

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What is the approximate length of a pendulum that takes 2.4 pi seconds to swing back and forth?
LuckyWell [14K]

Answer:

The length of the pendulum is 14.13 meters.

Step-by-step explanation:

The length of a pendulum is given by the formula, T = 2\pi \sqrt{\frac{L}{g} }, where T is the times period and L is the length of the pendulum.

Now, given that T = 2.4π seconds.

So, from the above equation, we get,

2.4\pi  = 2\pi  \sqrt{\frac{L}{g} }

⇒ \sqrt{\frac{L}{g}} = 1.2

⇒ \frac{L}{g} = 1.44 {We have the value of g as 9.81 m/sec²}

⇒ L = 1.44 × 9.81 = 14.13 meters. (Approx.)

Therefore, the length of the pendulum is 14.13 meters. (Answer)

3 0
3 years ago
A paved path is 162 feet long, 12 feet wide, and 4 inches deep. How many cubic feet of concrete will be required for the path?
AVprozaik [17]

Answer:

Step-by-step explanation:

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3 0
3 years ago
Once a large pink​ ribbon, the sign of the fight against breast​ cancer, was erected out of pink​ post-it notes on a billboard.
saul85 [17]

Answer:

Pretty sure the width would be 70

Step-by-step explanation:

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Masja [62]

Answer:

just a random Teenage who's been through the same thing

Step-by-step explanation:

if you really care about what your mom think I'd suggest changing some thing's about you . maybe study more or something . if you don't usually try then go ahead try harder.

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