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blsea [12.9K]
3 years ago
10

Convert into metre 81Km 30 m​

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:81030m

Step-by-step explanation:1km=1000m, 81km=81000+30=81030m

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Please help<br> i got one of them right
Snowcat [4.5K]
Comment
The trick is to know whether you should be reading your totals going down or across. We will be discussing this possibility carefully for the first question in the group.

In the meantime, letter the questions from A to H

A
A is the first member of a group of 5 where you read going down. You know this because you are give the gender first and then you want the total of the people (boys and girls) who participate in this activity.

So for A you have 8 boys who will choose swimming out of 17 (the rest of course are girls).
P(boy if swimming is the activity) = 8/ 17 = 0.47

B
P(girl if the activity is sports) = 7/27 = 0.26 Did you catch on that you were reading down?

C 
P(Girl if the activity is reading) = 4/6 = 0.67

D
P(Boy if the activity  is sports) = 20/27 = 0.74

E
This is the first question of the second group. Here you will get your totals by reading across. The reason is that you are given the activity, now you must supply the gender from the total number of people in the group of either boys or girls. 

P(Swimming given that it is a girl) = 9/20 = 0.45 In other words you know you area working with girls. What you need to declare is the probability of what these girls will choose.

F
P(probability of reading if it is a boy) = 2/30 = 0.07 Think very carefully how these answers are derived. It's all a matter of reading which total to take and why. In this case you are taking the total number of boys and how many of them are doing the activity.

G
 P(Swimming if a Boy) = 8/30 = 0.27 

H
P(reading if a girl) = 4/20 = 0.2

Very interesting question. You'll learn a lot if you consider which comes first and what that means.


8 0
3 years ago
in a class of 25 students 8% of the students play on a softball team how many students play on the softball team
Alla [95]

2 students play on the softball team

<u>Solution:</u>

Given that in a class of 25 students, 8 % of students play on a softball team

To find: Number of students play on softball team

Total number of students in class = 25

8 % of students play on a softball team means that 8 % of total students play on softball team

Therefore, number of students play on softball team is given as:

\rightarrow 8 \% \text{ of } 25\\\\\rightarrow 8 \% \times 25\\\\\rightarrow \frac{8}{100} \times 25\\\\\rightarrow \frac{8}{4} = 2

Thus 2 students play on the softball team

8 0
3 years ago
Use summation notation to express each of the following calculations Add the scores and square the sum O 2(SX) Square each score
iragen [17]

a)

Add the score and then square the sum.

By using the summation notation we can write the above statement is (Σx)²

b)

Square each score and then add the squared values.

By using the summation notation we can write the above statement is Σx²

Subtract 2 point from each score and then add the resulting values.

By using the summation notation we can write the above statement is  Σ(x-2)

Subtract 1 point from each score and square the resulting values. Then add the squared values.

By using the summation notation we can write the above statement is Σ(x-1)²

7 0
4 years ago
Complete the ratio table to convert the units of time from hours to weeks or weeks to hours.
Burka [1]

Answer:

168=1

1176=7

504=3

Step-by-step explanation:

HOPE THIS HELPED!!!

7 0
3 years ago
Read 2 more answers
George has opened a new store and he is monitoring its success closely.
Nataly_w [17]
(r-c)(3) means that you will simply plug in the value 3 as x in the functions r(x) and c(x) and take the difference of both.

Solving for the value of the functions we'll get:
r(3)= (3)^{2}+5(3)+14=9+15+14=38
c(3)= (3)^{2}-3(3)+14=9-9+4=4
(r-c)(3)=38-4=34

Since the value is positive, we can say that the store will profit in its third month. Knowing that r(x) and c(x) is measured in hundreds of dollars, we can also say that the profit will be $3400.

ANSWER: C. The new store will have a profit of $3400 after its third month in business.
4 0
3 years ago
Read 2 more answers
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