Answer:
72 minutes
Step-by-step explanation:
in minutes,
1/90 + 1/x = 1/40
x = 72
Answer:
Age of Lee = y years
Age of Toby = (y - 8) years
Sum of their ages < 41
or, y +y - 8 < 41
or, 2y - 8 < 41
Adding '8' on both sides,
or, 2y - 8 + 8 < 41
or, 2y < 41
Answer:
Sub to lazer beam
Step-by-step explanation:
Total angle=360=5*72
<span><span>area=5∗16.4π y<span>d2</span>=82π=82∗3.14 y<span>d2</span></span></span>
Answer:
(a)
(b)
(c) P(X ≤ 1) = 0.6321
(d) P(2 ≤ X ≤ 5) = 0.1286
Step-by-step explanation:
From the given information; Let consider X to be the time between two successive arrivals at the drive-up window of a local bank.
However; If X is regarded as the exponential distribution with λ = 1 which is identical to a standard gamma distribution with ∝ = 1
The objective is to compute the following :
(a) The expected time between two successive arrivals is;
(b) The standard deviation of the time between successive arrivals is;
(c) P(X ≤ 1)
P(X ≤ 1) = 1 - e⁻¹
P(X ≤ 1) = 0.6321
(d) P(2 ≤ X ≤ 5)
P(2 ≤ X ≤ 5) = [1 - e⁻⁵] - [1 - e⁻²]
P(2 ≤ X ≤ 5) = 0.9933 - 0.8647
P(2 ≤ X ≤ 5) = 0.1286