# To the cinema

Jane at 8 am got message that all 1093 school pupils will go to the cinema. Within 20 min she said it to the three friends. Each of them again for 20 minutes said to the other three. In this way the message spread further. At what time all the children in school know that they will go to the cinema?

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Insert into GP

Between numbers 5 and 640 insert as many numbers to form geometric progression so sum of the numbers you entered will be 630. How many numbers you must insert? - Geometric progression 2

There is geometric sequence with a_{1}=5.7 and quotient q=-2.5. Calculate a_{17}. - Intercept with axis

F(x)=log(x+4)-2, what is the x intercept - Exponential equation

In the set R solve the equation: ? - Sequence

Calculate what member of the sequence specified by ? has value 86. - Log

if ?, what is b? - Six terms

Find the first six terms of the sequence a1 = -3, an = 2 * an-1 - The city 3

The city has 22,000 residents. How long it is expected to have 25,000 residents if the average annual population growth is 1.4%? - Tenth member

Calculate the tenth member of geometric sequence when given: a_{1}=1/2 and q=2 - Geometric sequence 4

It is given geometric sequence a_{3}= 7 and a_{12}= 3. Calculate s_{23}(= sum of the first 23 members of the sequence). - Five members

Write first 5 members geometric sequence and determine whether it is increasing or decreasing: a_{1}= 3 q = -2 - Theorem prove

We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started? - Logarithm

Determine the number whose decimal logarithm is -3.8. - Powers 3

2 to the power of n divided by 4 to the power of -3 equal 4. What is the vaule of n? - GP - 8 items

Determine the first eight members of a geometric progression if a_{9}=512, q=2 - Exponential equation

Solve for x: (4^x):0,5=2/64. - Geometric progression

In geometric progression, a1 = 7, q = 5. Find the condition for n to sum first n members is: sn≤217.