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4 years ago

10

A submarine began a 120 feet below sea level and ascended at a rate of 13 feet per minute. What was the depth of the submarine a

fter 6 minutes.

1 answer:

Triss [41]4 years ago

7 0

The submarine would be 900 below the ocean surface after 12 minutes assuming it started its descent at the surface of the ocean.

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As part of a promotion for a new type of cracker, free trial samples are offered to shoppers in a local supermarket. The probabi

nordsb [41]

Answer: N(20, 4) distribution.

Step-by-step explanation:

Normal approximation to Binomial :

The normal approximation is used for binomial distribution having parameters n and p as

$\mu=np\\\\ \sigma=\sqrt{np(1-p)}$

if x is the random variable then x has $N(\mu, \sigma)$ .

Given : As part of a promotion for a new type of cracker, free trial samples are offered to shoppers in a local supermarket.

The probability that a shopper will buy a packet of crackers after tasting the free sample : p=0.20.

Different shoppers can be regarded as independent trials.

if X is the number among the next 100 shoppers who buy a packet of crackers after tasting a free sample.

Then, Mean and standard deviation for x will be :

$\mu=(100)(0.20)=20\\\\ \sigma=\sqrt{20(1-0.20)}=\sqrt{16}=4$

i.e. X has approximately an N(20, 4) distribution.

7 0

3 years ago

A pole that is 3.2m tall casts a shadow that is 1.54m long. At the same time, a nearby building casts a shadow that is 50.75m lo

Nastasia [14]

3.2m casts 1.54m shadow.

3.2÷1.54= 160/77 (2.077922077922...)

50.75 × 160/77= 105.454545...

105m to the nearest meter.

6 0

3 years ago

Chang knows one side of a triangle is 13cm which set of two sides is possible for the lengths of the other two sides of this tri

Nikolay [14]

Use the Pythagorean Theorem to check out these possibilities (which you really do need to share here).

Note that 13^2 = 12^2 + 5^2, so 12 and 5 are a possible set of side lengths here.

4 0

3 years ago

(EASY)(BRAINLIEST)Which of the four angles marked on the picnic table is obtuse?

Nataly [62]

The angle that is obtuse is 1, because it is greater than 90°.

Hope this helps and have a nice day:)

4 0

3 years ago

Read 2 more answers

What's the answer ?<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B255%20-%2030%7D%20" id="TexFormula1" title=" \sqrt{255

Aloiza [94]

Answer:

$\sqrt 255-30$

= -14.0312805773

7 0

3 years ago

Read 2 more answers