First, divide both sides by 3 to get log2x = 4/3.
Since you know a regular log has base 10, another way to write log2x = 4/3 is 10^(4/3) = 2x.
Then, divide both sides by 2.
x = 10.7722
Answer:
There are 1,512 books in all.
Step-by-step explanation:
All we need to do is multiply the number of books by the number of shelves.
So:
42 × 36 = 1,512.
Answer:
72
Step-by-step explanation:
Answer:

Step-by-step explanation:
To find the area of a rectangle you have to multiply the length by the width.
In your problem, the length and width are both equations, so you just have to multiply each part of the equation separately.
For example, if you were to put both equations with one over the other, you just have to multiply the aligned numbers.
The length is: x2 + 6x + 3
The width is: 3x2 + 4x - 2
and if you multiply the aligned numbers together, you get
3x2 + 24x - 6. Because:
x2 × 3x2 = 3x2,
6x × 4x = 24x,
and 3 × -2 = -6