Answer:
45 mph
Step-by-step explanation:
It took the car 4 hours to travel 180 miles
Then
It took the car 4/4 hours to travel 180/4 miles
Since 4/4 = 1 and 180/4 = 45
Then
It took the car 1 hours to travel 45 miles
Therefore ,the car was it going at 45 mph
Answer:
n=-6
Step-by-step explanation:
Downloaded Photomath it’s going to help you a lot, and show you step by step, also it’s free.
Since there are two cards that have at least one green side, the chance of the other side being green is 1/2.
(a) P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.11 + 0.52 + 0.19 = 0.82
(b) P(X ≥ 1) = P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) = 0.52 + 0.19 + 0.12 + 0.06 = 0.89
(c) µ = 0×0.11 + 1×0.52 + 2×0.19 + 3×0.12 + 4×0.06 = 1.5
(d) σ² = (0²×0.11 + 1²×0.52 + 2²×0.19 + 3²×0.12 + 4²×0.06) - µ² = 1.07
σ = √(σ²) ≈ 1.03
