For an exponential distribution, the standard deviation is equal to the mean.
(a) the standard deviation is 4 miles.
Answer:
22
Step-by-step explanation:
(4 x 4) + (2 x 3) = 16 + 6 = 22
Answer:
Hello!!! Princess Sakura here ^^
Step-by-step explanation:
6a)

6b)

Answer: -3/2
Step-by-step explanation:
The axis of symmetry, and thus the x-coordinate of the vertex, is given by 
So, the answer is 
No, Mr.Evans will make under $400. His base pay, 9.20 times the hours he worked at regular pay(40) would equal $368. Now, take those extra 2.25 hours he worked at 1.5 times his base pay of 9.20, which would give you $13.80. Now, multiply 13.80 and 2.25, and you get 31.05. These two amount added, would equal $399.05, leaving Mr. Evans at just under $400 earned that week.