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amid [387]
3 years ago
10

4. Metal mercury at room temperature is a liquid. Its melting point is -39°C. The freezing point of alcohol is-114°C. How much w

armer is the melting point of mercury than the freezing point of alcohol?
Mathematics
1 answer:
blondinia [14]3 years ago
3 0

Answer:

75 degrees Celsius

Step-by-step explanation:

-114 - -39 = -75

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Find the value of 216m³ - 8n³ if 6m - 2n=0 and mn=12​
mestny [16]

Answer:

0

Step-by-step explanation:

Given that,

6m - 2n=0

=>6m=2n

=>n=3m   [divide both side by 2]

& mn=12​

Now,

216c - 8n³

= 216m³- 8(3m)³

=216m³-  8 .27m³

=216m³- 216m³

=0

6 0
2 years ago
MONDAY<br> 1. start time: 4:15<br> finish time: 5:05<br> time in between:
ella [17]

Answer:

50 minutes

Step-by-step explanation:

We know there is 60 minutes in an hour. so if we do 4:15 + 50 minutes, it reaches 5:05 minutes.

6 0
3 years ago
Read 2 more answers
F(x) = x + 7<br> and<br> g(x) = x2<br> What is g( f(-9))
Tanya [424]

Answer:

4

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Assume that 8​% of people are​ left-handed. We select 6 people at random. ​a) How many lefties do you​ expect? ​b) With what sta
klemol [59]

Answer:

a) 0.48

b) 0.6645

c) 12.5

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they are left-handed, or they are not. The probabilities of each person being left-handed are independent. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

The number of trials expected to find r sucesses is given by

N = \frac{r}{p}

In this problem we have that:

Assume that 8​% of people are​ left-handed. We select 6 people at random. ​

This means that p = 0.08, n = 6

a) How many lefties do you​ expect?

E(X) = np = 6*0.08 = 0.48

​b) With what standard​ deviation?

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{6*0.08*0.92} = 0.6645

​c) If we keep picking people until we find a​ lefty, how long do you expect it will​ take?

Number of trials to find 1 success. So

N = \frac{r}{p} = \frac{1}{0.08} = 12.5

4 0
3 years ago
Pleease another question
Colt1911 [192]

Answer:

3rd option

Step-by-step explanation:

There are three wholes and 1 fourth which is 1/8 simplified so first improper fraction, CHECK!

The three wholes are all equal to 12 then there is another 1 fourth so 12+1=13 CHECK TOO!!!

(YAY WE SOLVED IT!)

4 0
3 years ago
Read 2 more answers
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