Answer:
The 95% confidence interval is "87.94, 91.86".
Step-by-step explanation:
The given values are:
Sample batches,
n = 25
Sample mean concentration,
= 89.9 mg
Amount of chemical,
σ = 5
α = 0.05
The critical value from Z table will be:
= 
= 
= 
Now,
The confidence interval will be:
= 
On substituting the values, we get
= 
= 
= 
Lower limit will be:
= 
= 
Upper limit will be:
= 
= 
Answer:
-5x -5x
-3y=-5x +12
/-5x /-5x
-5-3y=x+12
/-3 /-3
-5+y=x-4
+5 +5
y=x+1<---(y intercept(and it is its slop))
5x-3y = 12
/-3y /-3y
5x=-3y+12
/5 /5
x=-3y+2.4
/-3 /-3
-3+x=y+2.4
+3 +3
x=y+5.4<---(x intercept(not the slop because the y is not the first number))
Answer:
4 quarts
Step-by-step explanation:
Answer:
$1.91
Step-by-step explanation:
$2.30 / 5 = $0.46
$2.97 / 3 = $0.99
2 * $0.46 + $0.99 = $1.91