Answer:
They are used in place fir an unknow value
Step-by-step explanation:
Answer:
$94.50
Step-by-step explanation:
5% × 90 = 4.5
=> 90 + 4.5 = 94.5
Answer:
ok I can't do it, but maybe someone else will help you
Answer:
Null hypothesis: 
Alternative hypothesis:
And for this case we assume that we have equal variances so that means:

For this case the degrees of freedom are given by:

And replacing we got:

And the best answer would be:
a. 38
Step-by-step explanation:
For this problem we want to test the following:
Null hypothesis: 
Alternative hypothesis:
And for this case we assume that we have equal variances so that means:

For this case the degrees of freedom are given by:

And replacing we got:

And the best answer would be:
a. 38
Multiply price per pound by total pounds:
2.50 x 3.5 = 8.75
Total cost = $8.75