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Molodets [167]
2 years ago
5

Urgent.

Mathematics
1 answer:
den301095 [7]2 years ago
6 0

Answer:

#1. 105.5 because of the nine 4 goes to 5

#2. 67,990,000 because of the 4 it doesn't go up

#3. -4.1 because of the 4 the 0 goes to 1

if the number place before the one you are rounding is 5,6,7,8,or 9you go up by one and the rest becomes zeros

if the number place before the one you are rounding is 0,1,2,3,or 4 you stay the same and the rest becomes zeros

You might be interested in
If n is a positive integer, how many 5-tuples of integers from 1 through n can be formed in which the elements of the 5-tuple ar
Oksana_A [137]

Answer:

n + 4 {n \choose 2} + 6 {n \choose 3} + 4 {n \choose 4} + {n \choose 5}

Step-by-step explanation:

Lets divide it in cases, then sum everything

Case (1): All 5 numbers are different

 In this case, the problem is reduced to count the number of subsets of cardinality 5 from a set of cardinality n. The order doesnt matter because once we have two different sets, we can order them descendently, and we obtain two different 5-tuples in decreasing order.

The total cardinality of this case therefore is the Combinatorial number of n with 5, in other words, the total amount of possibilities to pick 5 elements from a set of n.

{n \choose 5 } = \frac{n!}{5!(n-5)!}

Case (2): 4 numbers are different

We start this case similarly to the previous one, we count how many subsets of 4 elements we can form from a set of n elements. The answer is the combinatorial number of n with 4 {n \choose 4} .

We still have to localize the other element, that forcibly, is one of the four chosen. Therefore, the total amount of possibilities for this case is multiplied by those 4 options.

The total cardinality of this case is 4 * {n \choose 4} .

Case (3): 3 numbers are different

As we did before, we pick 3 elements from a set of n. The amount of possibilities is {n \choose 3} .

Then, we need to define the other 2 numbers. They can be the same number, in which case we have 3 possibilities, or they can be 2 different ones, in which case we have {3 \choose 2 } = 3  possibilities. Therefore, we have a total of 6 possibilities to define the other 2 numbers. That multiplies by 6 the total of cases for this part, giving a total of 6 * {n \choose 3}

Case (4): 2 numbers are different

We pick 2 numbers from a set of n, with a total of {n \choose 2}  possibilities. We have 4 options to define the other 3 numbers, they can all three of them be equal to the biggest number, there can be 2 equal to the biggest number and 1 to the smallest one, there can be 1 equal to the biggest number and 2 to the smallest one, and they can all three of them be equal to the smallest number.

The total amount of possibilities for this case is

4 * {n \choose 2}

Case (5): All numbers are the same

This is easy, he have as many possibilities as numbers the set has. In other words, n

Conclussion

By summing over all 5 cases, the total amount of possibilities to form 5-tuples of integers from 1 through n is

n + 4 {n \choose 2} + 6 {n \choose 3} + 4 {n \choose 4} + {n \choose 5}

I hope that works for you!

4 0
3 years ago
Stefania has a collection 1432 mp3s. Of those songs, 25% are rock songs and 55% are rap songs. How many songs are other types of
Katena32 [7]
Start answering here
7 0
3 years ago
F(x) = 4^x-1; find f(3)​
charle [14.2K]

Answer:

f(3) = 63

Step-by-step explanation:

f(x) = 4^x-1;

Let x =3

f(3) = 4^3 -1

     = 64-1

     =63

6 0
3 years ago
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6(3w+5)+6(3w+2)?<br><br><br><br> a<br> n<br> s<br> w<br> e<br> r
baherus [9]

Answer:

36x+42 if you need it simplified

x=-7/6 if you set the equation equal to zero

8 0
3 years ago
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Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level
il63 [147K]

Answer:

The answer is B or It must be a positive number since it represents a number of hours.

Step-by-step explanation:

7 0
2 years ago
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