The value of the skirt with a tax is
$35.00 + ($35.00 x 0.07) = $37.45
He has $40.00 and his change will be
$40.00 - $37.45 = $2.55
Answer: (29.4, 32.6)
Step-by-step explanation:
From the question, we know that
Sample size (n) = 27
Sample mean (x) = $31
Sample standard deviation (s) = $3
We are to construct a 99% confidence interval interval for average amount spent on gift.
The formulae for constructing a 99% confidence interval for population mean is given as
u = x + tα/2 × s/√n...... For upper limit
u = x - tα/2 × s/√n...... For lower limit
tα/2 is the critical value for a 2 tailed test. This value of gotten from a t distribution table by checking the degree of freedom ( 27 - 1 = 26) against the level of significance ( 100% - 99% = 1%).
Hence tα/2 = 2.779
Let us substitute our parameters and solve
For lower limit
u = 31 - 2.779 × 3/√27
u = 31 - 2.779 ( 0.5773)
u = 31 - 1.6045
u = 29.4
For upper limit
u = 31 + 2.779 × 3/√27
u = 31 + 2.779 ( 0.5773)
u = 31 + 1.6045
u = 32.6
Hence the 99% confidence interval for population mean is given as 29.4, 32.6
Answer:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
12
,
15
)
Equation Form: x
=
12
,
y
=
15
Step-by-step explanation:
Answer:
The new dimensions of the field will be 44.8 feet by 19.6
Step-by-step explanation:
since the scale factor is 1.4, all the original dimensions are multiplied by 1.4
32 times 1.4 is 44.8 and 14 times 1.4 is 19.6
