Answer:
a) 279 b)254
Step-by-step explanation:
Mean = 269 days
standard deviation = 8 days
let n be the pregnancy lenght.
using normal distribution formula
z = (n – mean)/ standard deviation
n = z * standard deviation + mean
Now, z values for the top 12% has to be found using a z table.
The top 12% means 88% of area under the curve. In this case z = 1,176
n = 1,176 * 8 + 269
n = 278.4 = 279
The bottom 3% means 97% of area under the curve. In this case z = -1,882
n = -1,882 * 8 + 269
n = 253.94 = 254
It goes 2, 4, 10, 20 euros
(1,2)
(2,4)
(5,10)
(10,20)
Answer:
35 blocks are given to the class
Step-by-step explanation:
she has 19 pounds which she divides into 1/2 pounds
19/1/2
38 blocks
she keeps 3 of the blocks and gives the rest away
38-3
35 blocks
2 because rise/run so 8/4 which=2
