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
ale4655 [162]
3 years ago
10

Gieo 120 hạt giống của một loại cây thấy có 15 hạt nảy mầm. Với độ tin cậy 95% hãy tìm ước lượng khoảng cho tỷ lệ nảy mầm của lo

ại hạt giống đó.
Mn giúp mình với ạ
Mathematics
1 answer:
rosijanka [135]3 years ago
6 0

Answer:

sorry can't understand the language

You might be interested in
11. Find the sum of the arithmetic series. overset [22] underset{k=1}\huge{Sigma) (-4k - 13) =​
sergiy2304 [10]

Answer:

okay, we need to add up for all k=1 till k=22

we could do it like this

(-4*1 -13) + (-4*2 -13) + (-4*3 -13) + ...

but this is long and boring, so we need another valid, yet vastly faster method to calculate this sum

we know that the "-13" part will occur 22 times, so let's write this component as "-13*22"

the -4k gents bigger with each step, k will take all the natural numbers from 1 to 22

so we could write

"-4 * (1+2+3+4+5+6+7...+21+22l

alot simpler and faster, but not fast enough

let's add up all numbers from 1 to 22 into one number

1 + 22 = 23

2 + 21 = 23

3 + 20 = 23

...

this works eleven times (bc we use up 2 numbers in each step), so the numbers from 1 to 22 added up are just

23*11= 230+23 = 252

now let's construct the final calculation

-4 * 252 -13*22 = -1294

there's your sum.

hope it helps you overall.

brainliest would be very kind ic some else leaves an answer, may it be just a greeting

4 0
3 years ago
20 POINTS
denis-greek [22]

Answer:

c. 441ft^2

Step-by-step explanation:

Area is height times length and since it's a square, safe to say that the sides are equal in length. So square root both of the given areas of the 2 square:

\sqrt{841} = 29

\sqrt{400} = 20

Now u have side b and c of the triangle, it's a right triangle so use the Pythagorean theorem a^2 + b^2 = c^2

a^2 + b^2 = c^2

a^2 + 20^2 = 29^2

a^2 + 400 = 841

subtract 4 from both sides

a^2 = 441

square root both sides

\sqrt{a^2} = \sqrt{441}

a = 21

Now the side a of the triangle is also a side of the small square therefore

21^2 = 441

8 0
3 years ago
A Sqrt &amp;<br> B Sqrt 29<br> c 7<br> c 29
Effectus [21]

Answer: hi

Step-by-step explanation:

hi

4 0
3 years ago
A wheel has a radius of 13”; calculate the circumference.
Anit [1.1K]

Answer:

81.71"

Step-by-step explanation:

Circumference = 2*pi*radius

pi = 22/7

radius = 13

Circumference = 2*22/7*13 = 44*13 / 7 = 572/7 = 81.71"

4 0
3 years ago
Ricky buys a remote car. He applies a markup of 10%. Write two expressions that represent the price of the car
Softa [21]

Answer:

we have to learn this  in middle school

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • What is the measure of angle 2?
    15·1 answer
  • Divide f(x) by d(x), and write a summary statement in the form indicated.
    14·2 answers
  • The distance from the sun to the Andromeda galaxy is 1.2 x 10^19 miles. Light travels at a speed of 5.88 x 10^12 miles per year.
    13·1 answer
  • Solve the equation x-5=8
    14·2 answers
  • What is the value of X ?
    14·1 answer
  • (50) points please i already tried searching it and there was no results i have no choice so pleas help!
    10·1 answer
  • Stefan has a bag that contains 3 blue marbles and 5 red marbles only.What fraction of the marbles in the bag are blue?
    10·2 answers
  • Make x the subject of the formula y=7x + 4
    10·2 answers
  • 15 is what percentage of 30
    6·2 answers
  • Martina used 3 as the value of pi to estimate the area of a circular patio that had a diameter of 26 ft.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!