Answer:

Step-by-step explanation:
Factor 

=
Answer:
0
Step-by-step explanation:
19z-19z=0
this is because z is always equivalent to itself, and therefore 19z is equivalent to 19z
When you subtract two numbers that are equivalent, you will always get 0
Hey!
Question - According to the rule of 72, which statement is true? An investment of $3,100 will double in 12 years at a compound interest rate of 5%. An investment of $9,000 will double in 10 years at a compound interest rate of 7%. An investment of $4,500 will double in 8 years at a compound interest rate of 9%. An investment of $3,000 will double in 4 years at a compound interest rate of 12%
Answer - An investment of $3,000 will double in 4 years at a compound interest rate of 12%
0.012 / 3000 = 0.00004 = 4
Answer:
The correct answer to the exercise is:
- Surface area of a circle = 633.1

Step-by-step explanation:
To obtain the surface area of a circle, you can use the formula:
- Surface area of a circle = π *
Where:
- π = 3.14 (the exercise give this)
- r = Circle radius.
How you can see, in the picture gives you a straight line that passes through the circle side by side, the circle radius is half of that value, then:
- r = 28.4 mm / 2
- <u>r = 14.2 mm</u>
Now, we can replace the values in the first formula:
- Surface area of a circle = π *
- Surface area of a circle = 3.14 *

- Surface area of a circle = 3.14 * 201.64

- Surface area of a circle = 633.1496

- Surface area of a circle = 633.1
(rounded to the nearest tenth).