12. Since the length of DC is half of 10, which is 5 and using Pythagorean, it can be said 13^2 = x^2 + 5^2 so x^2 is 144
<u>EXPLANATION</u><u>:</u>
Given set A = { 1,2,3}
n(A) = 3
Let the n(B) be n
Total number of relations from A to B = 2^(3×n) =2^3n
According to the given problem
Total relations are = 512
⇛2^3n = 512
⇛2^3n = 2⁹
If bases are equal then exponents must be equal
⇛3n = 9
⇛n = 9/3
⇛n = 3
<h3>So, Number of elements in the set B = 3</h3>
The equation that solve for x is as follows;
70 + 60 + x = 180
<h3 /><h3>How to find an angle?</h3>
The equation that can be used to find the measure of angle x can be found as follows:
60 + 70 + y = 180
Therefore,
130 + y = 180
subtract 130 from both sides
130 - 130 + y = 180 - 130
y = 50°
70 + 60 + x = 180
130 + x = 180
x = 180 - 130
x = 50°
x and y are vertically opposite angles.
learn more on angles here: brainly.com/question/24460838
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Answer:
D 13
Step-by-step explanation:
To find out how many floors the building has, we take the height of the building and divide by the size of each floor
floors = 185.9 ft / 14.3ft per floor
= 13 floors
The cost for 9 lbs would be 63 dollars
