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3 years ago

The Moon Is 250,000 Miles Away. There Are 5,280 Feet In a Mile. Hkw Many Feet Is It From Earth ?

Mathematics

1 answer:

slega [8]3 years ago

4 0

To solve this, multiply 250,000 with 5,280

250000 x 5280 = 1,320,000,000

1,320,000,000 feet is your answer

hope this helps

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A game has an expected value to you of $100. it costs $500 to play, but if you win you receive $100,000 (including your $50

tekilochka [14]

Let $X$ be a random variable denoting the amount of winnings in any given round of the game. There is some probability $p$ of winning where $P(X=99,500)=p$ , while $P(X=-500)=1-p$ , assuming these are the only two possible outcomes. So we have

$\mathbb E[X]=\displaystyle\sum_xxP(X=x)=99,500p-500(1-p)=100$

$100,000p-500=100\implies p=\dfrac3{500}=0.006$

8 0

3 years ago

In this problem, we explore the effect on the standard deviation of adding the same constant to each data value in a data set. C

aliya0001 [1]

Answer:

3.6661

A, Adding a constant does nothing to the standard deviation

Step-by-step explanation:

I'm gonna assume s=standard deviation

The standard deviation is just the square root of the second moment minus the first moment squared

Because we were not told otherwise I think it's pretty safe to assume that all events are equally likely

Let's start by calculating the first moment (AKA The mean)

1/5(8+16+14+8+16)= 12.4

Let's then find the second moment

1/5(8²+16²+14²+8²+16²)= 167.2

√(167.2-12.4²)=3.6661

While I could just tell you that adding something to the standard deviation (and the variane as well) doesn't do anything let's calculate it for fun

same process

.2(16+24+22+16+24)= 20.4

.2(16²+24²+22²+16²+24²)=429.6

√(429.6-20.4²)= 3.6661

6 0

3 years ago

Shelly is 3 years older than Michelle. 4 years ago the sum of their ages was 67. find the age of each person now

Murljashka [212]

If Shelly is 3 years older than Michael and There 67. Michael is 64 and Shelly is 67. Or Michael is 67 and Shelly is 70.

Hope I helped. Have a wonderful day

3 0

3 years ago

Find. What part of 40 is 16?

levacccp [35]

Answer:

40%

Step-by-step explanation:

because convert the fraction 16/40 and the answer is 40%

._.

8 0

3 years ago

(7y – 20)<br> (5х – 38)<br> (3х – 4)<br> -<br> m

egoroff_w [7]

Answer:

Step-by-step explanation:

8 0

2 years ago