1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anarel [89]
3 years ago
8

(a) if each of them tells 1 person, and then everybody tells exactly 1 other person, and so on, how long will it take until all

450 students in the school hear the rumor? assume that the rate for telling the next person is 1 hour. that is, initially jack and jill know; after 1 hour, 2 more people know; after 2 hours, 2 more people know, . . . .
Mathematics
1 answer:
luda_lava [24]3 years ago
8 0
For this problem I recommend using the explicit version of the arithmetic sequence formula
an = a1 + (n – 1)d.

The first term is a1, the common difference is d, and the number of terms is n. an is the final number we are looking for.


We shall substitute in the common difference and 2 since every hour 2 more people will know. Also the first term is equal to 2. an is 450 because that's what we are looking for.


the equation looks like 450= 2 + (n – 1)2. Now we evaluate. n = 225. 225 terms will pass, then all 450 students will know the rumor. Each term will equal 1 hour . 225 hours converts to 9 full days and 9 hours. So it will take 9 days and 9 hours for every student to know the rumor at that rate.
You might be interested in
What is the probability of getting more than 60 heads in 100 tosses?
solniwko [45]
On a coin there is 2 sides so there is an even chance so if it’s 50 / 50 you would have to do more than 100 tosses to get over 60 heads
5 0
3 years ago
Read 2 more answers
All the dimensions of a pentagon were multiplied by the same factor, and area of the figure changed by a factor if 25. By what f
Oksana_A [137]

Answer:

50

Step-by-step explanation:

You add the 25 + another 25 and that adds up to 50. Hope this helps!

4 0
2 years ago
&
Nady [450]

Answer:

the answer is B and C

Step-by-step explanation:

9x4=36

6x6=36

6 0
2 years ago
Given: ABCD is a trapezoid, AC ⊥ CD AB = CD, AC=the square root of 75 , AB = 5 Find: AABCD
Ugo [173]

In this attached picture according to the conditions of the problem we have an isosceles trapezoid and since we know that legs are equal (AD=BC=5 cm), we have to calculate bases and height in order to find the area. Working with the triangle BCD, we apply Pythagoras theorem and find that CD = \sqrt{75+25} = 10 cm. Since BDC is a right triangle, applying theorem for the area of triangles, we find that \frac{1}{2} * BF =  \frac{1}{2} * 5 * \sqrt{75} and BF= 0.5\sqrt{75}. Since ABCD is an isosceles trapezoid, triangles ADE and BFC are congruent with Angle Side Angle theorem. Then, DE=FC and with the help of Pythagoras theorem, DE=FC=2.5 cm. Then, AB=EF=5 cm and the area of the trapezoid is  A= BF *  \frac{AB+CD}{2} = 0.5  \sqrt{75}  * \frac{5+10}{2} = 18.75 \sqrt{3}   cm^{2}

3 0
3 years ago
The first one will get the brianlist please help answer these two
Julli [10]

Answer:

<em>Hello bakugo here!</em>

Step-by-step explanation:

I don't see anything, is there supposed to be anything here? if not

<em>Thank you extra for FREE points! :D</em>

8 0
2 years ago
Read 2 more answers
Other questions:
  • List at least three shapes, other than hexagons, In the table. If the shape is a polygon, indicate whether the shape is regular
    9·1 answer
  • Which trigonometric ratios are correct for triangle DEF? Check all that apply.
    5·1 answer
  • A torch and a battery cost £2.50 altogether. The torch costs £2.00 more than the battery.
    12·1 answer
  • Please help me ASAP Please
    6·1 answer
  • Need help marking people as BRIANLIST
    10·2 answers
  • You have two cards with a sum of (-12) in your hand. What two cards could you have? *
    8·1 answer
  • Which answer is not a scientific notation.
    6·1 answer
  • What is the side length of the smallest square plate on which a 30 cm chopstick can fit along a diagonal without any​ overhang?
    13·1 answer
  • If m5 =x which angles also have a measure of x? Select all that apply
    5·1 answer
  • How do you solve the picture?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!