Answer:
probability = 0.9286
Step-by-step explanation:
given data
mean = $8.30
standard deviation = $4.70
waits parties over a weekend of work = 60
solution
when we earn at least $550 in 60 parties
so average per party will be x =
average x = 9.1667
so now we get here z value that is
...............1
put here value and we get
z =
z = 0.184404
so
P(x>9.1667) = P(z>0.184404)
use standard normal table
probability = 1 - 0.0714 = 0.9286
Answer:
[4, positive infinity)
Step-by-step explanation:
since there is a closed circle on 4, we include 4 in the continuous interval, and we assume that the arrow represents continuity after the graph ends, so the interval of continuity is from 4 to positive infinity.
Answer:
(x-3) (x-9) or (x-9) (x-3)
Step-by-step explanation:
1) what * what=27
and what+what=-12
factors of 27: 9,3 -9,-3 1,27 -1,27
-9+-3=-12
hence -9 and -3 are our factors
(substitute -9 and -3 in place of -12)
x^2-9x-3x+27
split into two groups:
x^2-9x
(both have a gcf of x)
x(x-9)
and
-3x+27
(both have a gcf of "-3"
-3(x-9)
take the numbers OUTSIDE the parantheses and put them in a bracket:
(x-3) (x-9)
Hope this helps!