Answer:
a) 0.3277
b) 0.0128
Step-by-step explanation:
We are given the following information in the question:
N(2750, 560).
Mean, μ = 2750
Standard Deviation, σ = 560
We are given that the distribution of distribution of birth weights is a bell shaped distribution that is a normal distribution.
Formula:

a) P (less than 2500 grams)
P(x < 2500)

Calculation the value from standard normal z table, we have,

b) P ((less than 1500 grams)
P(x < 1500)

Calculation the value from standard normal z table, we have,

Answer:
ℎℎ ℎ
Step-by-step explanation:
ℎℎℎℎ ℎ <em /><em /><em /><em /><em /><em /><em /><em><u /></em><em><u /></em><em><u /></em><em><u /></em><em><u /></em><em><u> </u></em><em><u /></em><em><u /></em><em><u /></em><em><u /></em><em><u /></em><em><u> </u></em><em><u>ℎ</u></em><em><u /></em><em><u /></em><em><u /></em><em><u /></em>
Answer:
downwards
Step-by-step explanation:
the equation of a parabola in vertex form is
f(x) = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
• if a > 0 then parabola opens upwards
• if a < 0 then parabola opens downwards
for
f(x) = - 4(x - 3)² + 9 with a = - 4 < 0 , then
the parabola opens downwards
It will be 6hours and a half an hour I hope this helps