Step-by-step explanation:
a geometric sequence is s sequence, where every new element is generated by multiplying the previous element by the same number.
a n = a1 × number^(n-1)
so, a12/a7 = number^5
=> 2187/9 = 243 = number^5
=>
[tex]number = \sqrt[5]{243} [/tex]
=> number = 3
so, what is a1 ?
it has to satisfy e.g. a7.
9 = a1 × 3^6
9 = 3^2
=> 3^2 = a1 × 3^6
=> 1 = a1 × 3^4
=> a1 = 1/(3^4) = 1/81
therefore, the whole formula is
a n = 1/81 × 3^(n-1 )
(WILL GIVE BRAINLIEST)
Answer:
i think the answer is B
Step-by-step explanation:
Simplify.
(2.7 x 10^) (3.5 x 10%)
9.45 x 107
9.45 x 106
9.45 x 1012
9.45 % 1011
Help please
A standard STOP sign is 12.4 inches on each side and is in the shape of a regular octagon. What is the sign's approximate area? Show your work for full credit. Round your answer to the nearest tenth if necessary.
Answer: 20.4
Step-by-step explanation:
Add all of the sides by 12.4
12.4 + 8 = 20.4
Answer:86.8
Step-by-step explanation:
you add 12.4 by the number of sides wich is 8
AREA How do you write1/2 as a percentage? Write your answer using a percent sign (%)
Answer:
50%
Step-by-step explanation:
1 is half of 2 and 50% of anything is half
Answer:
give me brainllest if i am right
50%
The probability of the number of defective circuit boards in a shipment is given in the tables for two different companies. Company A A 5-column table has 2 labeled rows. The first row is labeled Number defective (x) with entries 0, 1, 2, 3. The second row is labeled P (x i) with entries 0.21, 0.30, 0.41, 0.08. Company B A 5-column table has 2 labeled rows. The first row is labeled Number defective (x) with entries 0, 1, 2, 3. The second row is labeled P (x i) with entries 0.18, 0.32, 0.28, 0.22. What is the expected number of defective circuit boards for company A? What is the expected number of defective circuit boards for company B? Which company should be chosen for purchasing circuit boards? Explain.
Answer: company A: 1.36
company B: 1.54 A; lowest expected number of defective boards
Step-by-step explanation:
i got it right on edge
The weighted average is a generalization of the expected value. The company that should be chosen for purchasing circuit boards is Company A.
What is the expected value?The weighted average is a generalization of the expected value. The expected value is the arithmetic mean of a large number of independently chosen random variable outcomes.
A.) The expected number of defective circuit boards for company A is,
Expected number = (0.21×0) + (0.30×1) + (0.41×2) + (0.08×3) = 1.36
B.) The expected number of defective circuit boards for company B is,
Expected number = (0.18×0) + (0.32×1) + (0.28×2) + (0.22×3) = 1.54
C.) Since the expected number of defective circuit boards for Company A is less, therefore, the company that should be chosen for purchasing circuit boards is Company A.
Learn more about Expected value:
https://brainly.com/question/13945225
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Four times the sum of a number and 18 is at least -22
Answer:
x=7
Step-by-step explanation:
3x+4=18+x
2x=14
Set number equal to "x".
can someone help me understand this please
angle r = ___ degrees
Answer:
31
Step-by-step explanation:
The angle formed by two secants intersecting outside a circle is equal to half the difference of the intercepted arcs.
So ∠r = [tex]\frac{101-39}{2} =\frac{62}{2} =31[/tex]
angle r is 31 degrees.
Question 1
03.04MC)
The sum of the consecutive numbers is 84 What is the largest of these number? A. 26
B. 27
C. 28
D. 29
plz help im giving 15 points!
Answer:
i dont know because u didnt give me how many numbers
Step-by-step explanation:
Cynthia uses 15 1/2 gallons of gas while driving 310 miles in her car. What is the unit rate of miles per gallon?
no links please
Answer:
20 mi/gal
Step-by-step explanation:
310/ 15.5 = 20
5 green marbles
6 blue marbles
7 red marbles
2 purple marbles
what is the probability of picking a green marbel and replacing it
What is the probability of picking a red marbel and replacing it
A parabola can be drawn given a focus of (5, 9)and a directrix of y=3. Write the equation of the parabola in any form.
What is the value of x
Answer:
E. 128°
Step-by-step explanation:
X+52°=180°X=52°-180°X=128°Tree one is meters tall. Tree two is 10.5 meters tall. What is the scale factor
Answer: 10.5
Step-by-step explanation:
Samantha went running 10 days last month. The distances she ran are shown in the line plot below hows many day did Samantha run less than 56/8 miles
Answer:
For 6 days, Samantha ran less than 56/8 mile
Step-by-step explanation:
The remaining part of the question is attached
Solution
Given
As we know
56/8 can be reduced to 5 3/4
Hence, if we see the plot we can determine that Samantha ran 6 times less than 5 3/4 miles
For 6 days, Samantha ran less than 56/8 mile
Which is the equation of the line that passes through the point (-3,-9) and has an undefined slope?
Answer:
Step-by-step explanation:
i dont know
You just found the volume of a cylinder, which of the following would be acceptable units for the answer?
A: cm
B: cm^2
C:cm^3
D: none of these
Mariana has 5 tangerines and decides to give it to the students in her classroom, but since there are 29 students in her classroom, she decides to make a lottery among all of them and picks 5 names at random. What kind of sample is this? Why?
Step-by-step explanation:
Well, to be perfectly honest in my humble opinion, of course without offending anyone who thinks different from my point of view but also by looking into this matter in a different perspective and without condemning one's view and by trying to make it objectified and considering each and everyone's valid opinion, I honestly believe that I completely forgot what I was going to say.
Answer:
There are nine levels to choose from to suit pupils of different abilities. ... *See notes on saving names on the left side of this page ... I have a lot of partner and small group work in my classroom and I can guarantee that EVERY ... "I like the random student generator, but I want a feature to have a true "pick from the hat" where ...
Step-by-step explanation:
Solve the varible :
1: -5z + 8 = 33
2: -4b - 7 = 37
3: 8x + (-9) = 45
4: 6c + 7 = -29
Answer:
1: -5z + 8 = 33
-5z=33-8
z=-25/5
z=-5
2: -4b - 7 = 37
-4b=37+7
b=-42/4
b=21/7
3: 8x + (-9) = 45
8x=45+9
x=54/8
x=27/4
4: 6c + 7 = -29
6c=-29-7
c=-36/6
c=-6
Find the average (mean) of the following test scores
83,92,47,78,80
A.76
B.70
C.72
D.83
E.68
Answer:
A
Step-by-step explanation:
Step by step explanation
Please help! I will give Brainliest!
Answer:
Option. A
Step-by-step explanation:
Have a great day!
Answer: A
Step-by-step explanation: there's 8 spaces on the spinner
Giving brainlist to whoever answers
How many unit cubes are needed to make the large cube?
Answer:
D. 64 should be the answer
Step-by-step explanation:
length x width x height
4 x 4 x 4
4^2
64
Can someone help me please I need both area and perimeter
Answer:
A=2300
P=240
Step-by-step explanation:
Area)
separate the shapes
Rectangle 1
30+20=50
50×30=1500
Rectangle 2
70-30=40
40×20=800
Area 1500+800=2300
Perimeter)
First we find every dimention
So now we add
30+30+50+70+20+40
30+30=60
60+50=110
110+70=180
180+20=200
200+40=240
pls hurry!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
You didn't post any questions
What is the measure of angle B in degrees?
A) 30
B) 45
C) 60
D) 90
Answer:
its a 30 my friend and if its not a then choose b hope this helped
Step-by-step explanation:
CAN SOMEONE HELP LIKE RIGHT NOW!!!!!
Answer:
30 + 25 + (4x + 25) = 180
55 + (4x + 25) = 180
-55 -55
4x + 25 = 125
-25 -25
4x = 100
Divide by 4 on both sides
X = 25
Now we just replace the x with 25
4 x 25 = 100, 100 + 25 = 125 degrees is the missing angle of y
Would you rather be able to breath underwater or fly through the air?
Answer:
breathe underwater
Step-by-step explanation:
Answer:
fly through the air
Step-by-step explanation:
because i could get to where i wanted to faster
hope this helps
NEED HELP ASAP 15 POINTS
Answer:
mean = 2
median = 2.5
Step-by-step explanation:
There are a total of 20 goals (1*0 + 3*1 + 1*2 + 3*5 = 0 + 3 + 2 + 15 = 20)
There are 10 games, so 20/10 = 2 = mean
Threre are 5 games with goals greater than 2.5 and 5 games with goals below 2.5. So the median is 2.5
What is 2 1/4 + 1 1/8?
Step-by-step explanation:
2(1/4) + 1(1/8)
9/4+9/8
lcm is 8
(18+9)/8
27/8=3.375=3 3/8
A doctor compiles a numbered list of all his 350 patients. He selects every 25th patient to receive a survey after
choosing to randomly start with the seventh name on the list. Which statement correctly identifies and justifies
whether the scenario represents an SRS?
O This represents an SRS because the sample was selected with a chance process.
O This represents an SRS because there were no restrictions placed on the sample group.
This does not represent an SRS because each individual chosen does not have an equally likely chance of being
chosen.
O This does not represent an SRS because each group of patients chosen does not have an equally likely chance
of being chosen.
Answer: This does not represent an SRS because each group of patients chosen does not have an equally likely chance of being chosen.
Answer:
the answer is D. This does no represent an SRS because each group of patients chosen does not have an equally likely chance of being chosen
Step-by-step explanation:
