Answer:
1564.
Step-by-step explanation:
First term = -28 and common difference = 15.
Sum = (17/2)(2*-28 + (17-1)15)
= 8.5 * 184
= 1564.
A is the only equation that would reflect this table
So in your question that ask to calculate the length of 2nd avenue between 18th Street and 17th Street, to nearest foot. Base on my calculation, I came up with an answer of C. 671 ft. I hope you are satisfied with my answer and feel free to ask for more clarifications.
Answer:
Step-by-step explanation:
given that certain tubes manufactured by a company have a mean lifetime of 800 hours and a standard deviation of 60 hours.
Sample size n =16
Std error of sample mean = 
x bar follows N(800, 15)
the probability that a random sample of 16 tubes taken from the group will have a mean lifetime
(a) between 790 and 810 hours,
=
(b) less than 785 hours

, (c) more than 820 hours,

(d) between 770 and 830 hours
=