12x=x+99
11x=99
x=9
therefor his age is 9
Feather: grams
bulldog:kilo
tv: kilo
penny: grams
Answer:
see explanation
Step-by-step explanation:
Given
v < 7
Then the values which are solutions must be less than 7, thus
v = 7 ← No
v = 11 ← No
v = 1 ← Yes
v = 5 ← Yes
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:
C.2
Step-by-step explanation: