False. What about the penguins?
Although other birds can fly, only penguins can't. They are good at swimming and diving.
Answer: The confidence interval is 1.69ppb±0.055
Step-by-step explanation:
To find the confidence interval, first find the z* which is the appropriate z*-value related to the confidence interval of preference. As in this is 95%, z*-value = 1.96 (Note: The value is from the standard normal Z distribution).
With the z*-value, multiply by the division of the standard deviation and the square root of the sample size:
z*-value . σ/√n = 1.96 · 
= 0.055
The 95% confidence interval of the sample mean of 1.69 ppb is 1.69ppb±0.055ppb
Answer:
Step-by-step explanation:
i hope it's to help
Answer:
(a) 65 gallons per minute
(b) 280 gallons
(c) 8080 gallons
(d) 150 minutes.
Step-by-step explanation:
Water is filled up by pumps into a tank at a constant rate.
The volume of water in the tank V, in gallons, is given by the equation
V(t) = 65t + 280 ......... (1), where t is the time, in minutes.
(a) The rate at which water is pumped into the tank is 65 gallons per minute. (Answer)
(b) 280 gallons of water was there in the tank when the pumps were turned on because f(0) = 65 × 0 + 280 = 280. (Answer)
(c) After 2 hours i.e. (2 × 60) = 120 minutes the volume of water in the tank will be f(120) = 65 × 120 + 280 = 8080 gallons. (Answer)
(d) The tank has a capacity of 10000 gallons of water.
So, if the tank starts to overflow after t minutes, then
10000 = 65t + 280
⇒ 65t = 9720
⇒ t = 149.53 minutes ≈ 150 minutes (Answer)
