She will need 9 computers. She has 8 groups of 3 and 1 group of 2. Therefore, she will need 9.
Step-by-step explanation:
Charges per page = $0.08
Amount Lionel paid = $20.00
No of pages = 20 ÷ 0.08 = 250 pages
Answer: 6.71, and 6.7
Step-by-step explanation:
In order to write to two decimal places, we must first calculate the square root of 45.
The square root of 45 is 6.708
Therefore, when we round, we get 6.71
In order to write to two sig figs, we remember that sig figs are the number digits without zeros on the end.
Therefore, all we take is the 6.7
Answer:
39 ft
Step-by-step explanation:
Using the description as a guideline I have drawn out the situation (badly drawn) as seen in the picture below. From the picture, we see that we need to find x which is the length of one of the ropes. Once we have this length we simply multiply it by 3 to find out how much rope we need altogether. Since this is the diagonal of a triangle we can use the Pythagorean theorem to solve for x.
Pythagorean theorem:
.... which a and b are the two sides while x is the diagonal.


... now we square root both sides

Now that we have the length of one of the ropes we simply multiply this by 3 to find the total amount of rope needed.
13 * 3 = 39 ft