Answer:

Step-by-step explanation:
The volume of a pyramid is

where B = area of the base, and h = height of the pyramid
The base is a square.




The side of the base has length 6. Each face of the pyramid is an equilateral triangle with side of length 6.
An altitude of this triangle measures


The pyramid is formed by 4 equilateral triangles whose bases form a square. The tips of the faces meet at a single point on top. The vertical distance from that point to the center of the base is the height of the pyramid.




Volume of the pyramid:



Answer:
Ms. Day bought 5 blankets and 4 pillows.
Step-by-step explanation:
Let
denotes number of blankets and
denotes number of pillows.
Blankets cost her $16 while pillows cost her $10 and Ms. Day spent a total of $120.

Divide this equation by 2.

Ms. Day bought 9 items.

Multiply this equation by 5.

Subtract
from 

Put
in 

Therefore,
Ms. Day bought 5 blankets and 4 pillows.
Answer:
Step-by-step explanation:
2 m 30 cm
2 m 60 cm
+
_________
4m 90cm
Answer:
11.20
Step-by-step explanation:
Multiply both equations by 100:
19.99=1999
8.79=879
1999-879=1120
Divide by 100:
1120/100=11.20 saved ................
Answer:
154,897
Step-by-step explanation:
Labradors were
6997 MORE than 15 TIME Danes
So, first, what is 15 times Danes??
Given 9860 Danes, fifteen times Danes would be:
9860 * 15 = 147,900
Now, 6997 MORE to that, it would be:
147,900 + 6997 = 154,897
Thus,
There were 154,897 registered Labrador Retrievers