Since we aren't told the length of the 3rd bar, focus solely on the lengths of the first 2 bars. Add together their lengths: 1.15 cm + 3.92 cm = 5.07 cm.
https://www.khanacademy.org/math/ap-statistics/analyzing-categorical-ap/stats-two-way-tables/v/two-way-relative-frequency-tables
Answer:
Jack
Step-by-step explanation:
Jack has more books because 15 is more than 12
lol
Answer:
ones
Step-by-step explanation:
Answer:

Step-by-step explanation:
For the surface area we need to add up all the areas in the pyramid:
- area of the triangle sides (there are 4 triangles)
Area of the base:
the base is a square, and the area of a square is given by:

where
is the length of the side:
, thus:

Area of the triangles:
one triangle has the area given by the formula:

where
is the base of the triangle: 
and
is the height of the triangle:
, thus we have the following:

the expression that represents the surface area of the pyramid is:

substituting our values:

which is option B