Given:
μ = 500 days, the population mean
σ = 60 days, the population standard deviation
Therefore
μ + σ = 560
μ - σ = 440
μ + 2σ = 620
μ - 2σ = 380
μ + 3σ = 680
μ - 3σ = 320
The figure shown below illustrates the normal distribution
About 68% of the total area lies in x = (μ-σ, μ+σ)
About 95% of the total area lies in x = (μ-2σ, μ+2σ)
About 99.7% of the total area lies in x = (μ-3σ, μ+3σ).
Answer:
$490
Step-by-step explanation:
$9800 * 1/20 = $490
9800 * 5% = $490
Answer:
4:7
Step-by-step explanation:
4:7
they make 7 cakes in total (3:4 = 7).
there are 4 vanilla cakes.
therefore, the ratio of vanilla cakes to the total number of cakes is 4:7.
Step-by-step explanation:

Answer:
4!!!
Step-by-step explanation:
brainliest please?