S= 70w + 750
s(19) = 70w x 19+350= 1680
so its 1680
Answer:
z = 9
z = 2
z = 5
z = 8
z = 11
Step-by-step explanation:
Answer: Test statistic = -8 and rejected region is (-∞,-1.966) and (1.966, ∞)
Step-by-step explanation:
Since we have given that
X is the length of a rod.
Sample Mean = 2 inches
Standard deviation = 0.5 inches
n = 400
Hypothesis are

Test statistics would be

Degrees of freedom = n-1 =400-1 =39
and 
Using the t-distribution table, we get that critical value z = 1.966
Since the two tail test will be applied to this,
So, the acceptance region will be (-1.966, 1.966)
Hence, the rejected region will be (-∞,-1.966) and (1.966, ∞)
Answer:
7
negative of a negative number is equal to the positive of that number
put values
Do like you do algebraic addition
- -5i+10j-24i+32j
- -5i-24i+10j+32j
- -29i+42j
Option A