Answer: 7
Step-by-step explanation:
1 Simplify \frac{4}{15}x
15
4
x to \frac{4x}{15}
15
4x \frac{4x}{15}=1.44
4x =1.44
2 Multiply both sides by 1515.
4x=1.44\times 15
4x=1.44×15
3 Simplify 1.44\times 151.44×15 to 21.621.6.
4x=21.6
4x=21.6
4 Divide both sides by 44.
x=\frac{21.6}{4}
x= 4
21.65 Simplify \frac{21.6}{4} 421.6 to 5.45.4.
x=5.4
x=5.4
321.5 is between ___321_____ and ___322_____ on the number line.
Answer
B
321 and 322
Answer:

Step-by-step explanation:
The area of a regular octahedron is given by:
area =
. Let a is the length of the edge (diagonal).
area = 
Given that the diagonal of the octahedron is equal to height (h) of the tetrahedron i.e.
a = h, where h is the height of the tetrahedron and a is the diagonal of the octahedron. Let the edge of the tetrrahedron be e. To find the edge of the tetrahedron, we use:

The area of a tetrahedron is given by:
area =
=
The ratio of area of regular octahedron to area tetrahedron regular is given as:
Ratio = 
Answer:
Step-by-step explanation: