The surface areas of two cubes have a ratio of 49 to 81. What is the ratio of the edge lengths of the two cubes?

A

7 to 9

B

1 to 32

C

32 to 49

D

3 to 4

A

7 to 9

Step-by-step explanation:

We have that:

The ratio of the edges is x.

The ratio of the surface areas is given by

The ratio of the volumes is given by

In this question, we have that:

So

So the correct answer is given by option A.

the answer is b.)

< 1=< 2

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°