Answer:
9
Step-by-step explanation:
18+45 is 63
2+5 is 7
63/7 is 9
x=9
It would be five times as many planes so 12*5=60 planes
Answer:
test statistic, z = −1.74
Step-by-step explanation:
given data
students n = 100
mean time x = 41.13 seconds
σ = 5
we consider µ = 42
solution
we get here The test statistic that is express as
test statistic, z =
......................1
put here value and we will get
test statistic, z = \frac{41.13-42}{\frac{5 }{\sqrt{100}}}
test statistic, z = −1.74
That is the Identity Property of Multiplication