by starting from the number on the z axis and going up from the y axis
We have the mean, μ = 20 and the standard deviation, σ = 4
X ≈ N(20, 4²)
We want P(X<15)
Standardising gives
P(X<15) = P(Z<

)
P(X<15) = P(Z< -1.25) ⇒ When the value of the z-score is negative, we will read the value of z<1.25 on the z-table then subtract the answer from 1
P(X<15) = 1 - P(Z<1.25)
P(X<15) = 1 - 0.8944
P(X<15) = 0.1056
Hence, the probability that pizza takes less than 15 minutes to be delivered is 0.1056 = 10.56%
Answer:
1.732i (complex form)
its weird, at high-school level complex shouldn't come, its considered mistake in the question. But the mathematically its all correct
Step-by-step explanation:
Answer:
Question 6. M(5, 2)
Question 7. M(-6, 0)
Step-by-step explanation:
1. C(3, -5) and D(7, 9)
Use the midpoint formula:
(x1 + x2/2, y1 + y2/2)
(3 + 7/2, -5 + 9/2)
(10/2, 4/2)
(5, 2)
2. S(-8, -6) and T(-4, 6)
Use the midpoint formula:
(x1 + x2/2, y1 + y2/2)
(-8 + -4/2, -6 + 6/2)
(-12/2, 0/2)
(-6, 0)