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EastWind [94]
3 years ago
7

Which tool would you use to measure the mass of a mobile phone

Mathematics
2 answers:
iragen [17]3 years ago
6 0
<span>Since on the Earth, mass = weight, you can use a scale.


hope that helped</span>
SVEN [57.7K]3 years ago
5 0
You could use a weighing scale, but if the mobile is easy to measure, you can use ruler, take the measurements of length width and height, and use formula for volume
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5 men take 45hours to build a wall.how long will it take 9men working at the same wall?​
Karolina [17]

Answer:

<u>25 hours</u>

Step-by-step explanation:

It takes 5 men 45 hours to build a wall.

So, if no. of men increases by 1.8 [∴ 5 x 1.8 = 9],

then time taken reduces by that same amount.

=> 45 hours / 1.8

=> 45 / (9/5)

=> 45 x 5 / 9

=> 5 x 5

=> <u>25 hours</u>

7 0
2 years ago
Miguel is a golfer, and he plays on the same course each week. The following table shows the probability distribution for his sc
aivan3 [116]

1) 4.55

2) Short hit

Step-by-step explanation:

1)

The table containing the score and the relative probability of each score is:

Score 3 4 5 6 7

Probability 0.15 0.40 0.25 0.15 0.05

Here we call

X = Miguel's score on the Water Hole

The expected value of a certain variable X is given by:

E(X)=\sum x_i p_i

where

x_i are all the possible values that the variable X can take

p_i is the probability that X=x_i

Therefore in this problem, the expected value of MIguel's score is given by:

E(X)=3\cdot 0.15 + 4\cdot 0.40 + 5\cdot 0.25 + 6\cdot 0.15 + 7\cdot 0.05=4.55

2)

In this problem, we call:

X = Miguel's score on the Water Hole

Here we have that:

- If the long hit is successfull, the expected value of X is

E(X)=4.2

- Instead, if the long hit fails, the expected value of X is

E(X)=5.4

Here we also know that the probability of a successfull long hit is

p(L)=0.4

Which means that the probabilty of an unsuccessfull long hit is

p(L^c)=1-p(L)=1-0.4=0.6

Therefore, the expected value of X if Miguel chooses the long hit approach is:

E(X)=p(L)\cdot 4.2 + p(L^C)\cdot 5.4 = 0.4\cdot 4.2 + 0.6\cdot 5.4 =4.92

In part 1) of the problem, we saw that the expected value for the short hit was instead

E(X)=4.55

Since the expected value for X is lower (=better) for the short hit approach, we can say that the short hit approach is better.

8 0
3 years ago
Describe how the graph of y= x2 can be transformed to the graph of the given equation. (2 points)
Darya [45]
1. Is too easy it’s 300
5 0
3 years ago
I need help with geometry
Tju [1.3M]
Answer - C - SSS because you know no angle measures
5 0
2 years ago
Read 2 more answers
Are the lines in the diagram perpendicular, parallel, skew, or none of these?
torisob [31]

Answer:

need a diagram to be able to answer

Step-by-step explanation:

3 0
3 years ago
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