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
Vinvika [58]
3 years ago
11

At a certain excavation site, archaeological studies have used the method of tree-ring dating in an effort to determine when peo

ple lived in there. wood from several excavations gave a mean of (year) 619 with a standard deviation of 42 years. the distribution of dates was more or less mound-shaped and symmetrical about the mean. use the empirical rule to estimate a range of years centered about the mean in which about 99.7% of the data (tree-ring dates) will be found.
Mathematics
1 answer:
Molodets [167]3 years ago
8 0
The range of years would be 493 to 745.

According to the empirical rule, 99.7% of data will fall within 3 standard deviations from the mean.  Using this information, we have

619+3(42) and 619-3(42)
619+126 and 619-126
745 and 493
You might be interested in
The diagonal of a square are _
Elan Coil [88]

Answer:

D. perpendicular

Step-by-step explanation:

The sides of squares are congruent. The diagonal bisects it's angles .The diagonal are perpendicular bisector of each other.

4 0
3 years ago
How many positive integers $n$ satisfy $127 \equiv 7 \pmod{n}$? $n=1$ is allowed.
Svetllana [295]
Naturally, any integer n larger than 127 will return 127\equiv127\mod n, and of course 127\equiv0\mod127, so we restrict the possible solutions to 1\le n.

Now,

127\equiv7\mod n

is the same as saying there exists some integer k such that

127=nk+7

We have

\implies 120=nk

which means that any n that satisfies the modular equivalence must be a divisor of 120, of which there are 16: \{1,2,3,4,5,6,8,10,12,15,20,24,30,40,60,120\}.

In the cases where the modulus is smaller than the remainder 7, we can see that the equivalence still holds. For instance,

127=21\cdot6+1\iff127\equiv1\equiv7\mod6

(If we're allowing n=1, then I see no reason we shouldn't also allow 2, 3, 4, 5, 6.)
5 0
3 years ago
Some1 help pls and ty​
joja [24]

Answer:

b=4 x A

Step-by-step explanation:

8 0
2 years ago
Which value in the set {12.16,44,52} is a solution of the equation 4g= 48? Show your work. ANSWER ASAP
Alexus [3.1K]

Answer:

The answer is 12.

Step-by-step explanation:

If you divide 48 by 4 will give you 12 and it's correct because when you multiply 4 times 12 give you 48. You can also use the solution of the picture.

6 0
3 years ago
A company has 10 men qualified to run a machine that requires 3 operators at a time. Find how many groups of 3 operators are pos
bagirrra123 [75]
120 groups <span>(10*9*8/3*2*1=120) </span>of 3 (k) operators are possible to make from the 10 (n) qualified employees. This problem can be solved using the combination formula in mathematics which is to find the possible number of combination (group of operator) from a set of choices. (Formula : n*(n-1)*...* (n-k+1)/ k!).
5 0
3 years ago
Read 2 more answers
Other questions:
  • Please help me answer this calc A question
    10·1 answer
  • Can someone tell me what the answer is please
    7·1 answer
  • Help Please!!! What is the experimental probability of drawing a red marble, given the following results? Marble Color Blue Gree
    9·1 answer
  • suppose the number of pints of liquid is represented by P write an expression to find the number of fluid ounces
    9·1 answer
  • PLEASE HELP MEEE!!!!!!!?
    12·1 answer
  • 12-x=15 <br> What does x equal?
    9·2 answers
  • Suppose that an individual has a body fat percentage of 16.4% and weighs 129 pounds. How many pounds of his weight is made up of
    7·2 answers
  • Please help, if you get it right you’ll get brainliest :))
    15·1 answer
  • F(x)=60*(1.15)^x what is f(6)?
    9·1 answer
  • What is the y-intercept of a line that passes through the points (5, -6.5) and (-12, 2)?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!