Suppose the wait to passthrough immigration at JFK Airport in New York is thought to be bell-shaped and symmetrical. It is known that 68% of travelers will spend between 18 and 40 minutes waiting to pass through immigration. The 68% statistic refers to a range that is symmetrical around the mean. The standard deviation for the wait time through immigration is .

im not sure

step-by-step explanation:

its a straight line parallel to the time axis

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.

b because it contains 40% of the possible results from the random list.  

0,1,2,3 v 4,5,6,7,8,9  

4 integers to 6 integers  

40% success vs 60% fail

step-by-step explanation: