Angle B is 80 degrees.
X equals 11.
Children's books cover the most shelf space in the store.
Mysteries = 3/10
Travel = 25%
children = 7/20
Based on the problem, the total number of shelves in the bookstore is 20.
Therefore:
Mysteries = 3 / 10 * 20 = 6 shelves
Travel = 25% * 20 = 5 shelves
Children = 7/20 * 20 = 7 shelves
Total shelves occupied by the three types of stories is 18.
Children's books cover the most shelf space in the store.
For a known standard deviation, the confidence interval for sample size = n is
where
x = average
n = sample size
= stad. deviation
z = contant that reflects confidence interval
Let a = x
Let b =
From the given information,
a - b = 0.432 (1)
a + b = 0.52 (2)
Add (1) and (2): 2a = 0.952 => a = 0.476
Subtract (2) from (1): -2b = -0.088 => b = 0.044
Therefore, the confidence interval may be written as
(0.476 - 0.044, 0.476 + 0.044), or as
(0.476
0.044)
Answer:
sandwiches n[S]=4
drinksn[D]=3
desserts[d]=2
total n[T]=9
number of possible choices for:
4 sandwiches=n[S]/n[T]=<u>4/9</u>
For
3 drinks=n[D]/n[T]=3/9=<u>1/3</u>
and
For 2 desserts=n[d]/n[T]=<u>2/9</u>
At death means x= 0, so on the graph you can see that (0, 500), so 500 carbon atoms are present at death.
Plug 11,240 in for t in the equation, and you are left with N(t) = 500(1/2)^2 = 125 carbon atoms.
See the graph point (25,000, 24.298)? That means that after 25,000 years 24.298 carbon atoms will be present. So the answer is 25,000 years.