<u>Story Problem</u>
Mr. Bill Gates bought a house in Italy for
and a house in Canada for
. What is the total cost of the two houses?
we know that
The total cost is the sum of the cost each house
so

therefore
the answer is
The total cost is 
Answer:

Step-by-step explanation:
If we had 2 independent samples with population variances unknown and equal and we want to compare the population mean between the both groups, the test statistic will be:

Where 
So, the t-student has
degrees of freedom
Where
and
are the means of the groups,
and
are the size of the samples and
and
are the sample variances.
Answer:
10
in
Step-by-step explanation:
Use the volume formula for a rectangular prism, V = lwh
Plug in the volume, length, and width, then solve for the height
V = lwh
157 = (5)(3)(h)
157 = 15h
10
= h
So, the box's height is 10
in
Answer:
450.19 ×10 and 7 as the index
why is no one answering? I also need help in this question!!!!