7a-17=4a+1
7a-4a=1+17
3a=18
a=6
ans: a=6
A 95% confidence interval on the z-table is 1.96.
Now find the standard error using the formula: standard deviation / square root sample size:
0.7 / √100 = 0.07
Multiply to the confidence interval: 1.96 x 0.07 = 0.137 = 0.14
Now add and subtract tot he average weight:
14 - 0.14 = 13.86
14 + 0.14 = 14.14
The answer is 13.96 ≤ u ≤ 14.14
Multiply the square foot by the cost:
18 x 2.29 = 41.22
Multiply the total price by 1+ sales tax:
41.22 x 1.07 = $44.11 Total
15 quarters does Ethan posess! hope this helped.
