Answer:
The upper bound is 399.5
Step-by-step explanation:
Let's start by calculating the mean value of the distribution as the addition of all values given divided by 12:
Average = 289.75.
If the standard deviation is 56, then the upper bound in 95% the confidence interval for the mean price of the phones is going to be given by the mean value added to 56 times 1.96 (since 95% of the population is withing 1.96 times the standard deviation)
That is: 289.75 + 56 * 1.96 = 399.51
which rounded to one decimal place gives: 399.5
Answer:
$341.96
Step-by-step explanation:
Assuming Kerry was not paid at an overtime rate for extra hours (despite his union affiliation), his gross pay is ...
(46 h)×($9.60/h) = $441.60
His percentage deductions add to 17.65%, so will have a dollar amount of ...
0.1765×$441.60 = $77.94
The dollar amount deductions total $21.70 in addition to his percentage deductions, so Kerry's net pay is ...
$441.60 -77.94 -21.70 = $341.96
-3x + 5y = -9
4x + 8y = 12
Simplify the second,
x + 2y = 3
Times three,
3x + 6y = 9
Add to the first equation,
11y = 0
y = 0
-3x + 5(0) = -9
x = 3
Answer: x=3, y=0
Answer:
60 stamps
Step-by-step explanation:
Has 33 now. Before adding 13 stamps, she had (33-13) 30. This is half of her total, since she already sold half. To get the whole, multiply 30 by 2. 60 She started with 60
I think its B)55
i hope it helps
