Answer:
126
Step-by-step explanation:
42% of 100 in 42
100x3=300 soooo
42x3=126
If you would like to know how long will take you to paint one wall, you can calculate this using the following steps:
1/3 of a wall ... 1/4 hour1 wall ... x hours = ?
1/3 * x = 1/4 * 11/3 * x = 1/4 /*3x = 1/4 * 3x = 3/4 hour
Result: It will take you 3/4 hour to paint one wall.
3x² (6x² - 13x - 5) =
3x² (2x - 5) (2x+1) .
Correct answer: True
Each number in the right set corresponds to unique number in the left set. Therefore, this mapping is a function.
The total surface area of a coin can be solve by using this formula
Surface Area = Area Front + Area Back + Area Side
Surface Area = 2Area Front/Back + Area Side
The Area of the Front and Back of the coin can be solve by using the formula of a circle which is

And the Area of a Side of the coin can be solve by using the formula
A = πd x thickness
We will solve first the surface area of a $5 coin.
note: 2.5 cm = 25 mm
Surface Area = 2(π(d/2)^2) + πd x thickness
= 2(π(12.5)^2) + 25π x 3
= 2 (156.25π) + 75π
=312.50π + 75π
= 387.50π
Surface Area of $5 coin is 387.50π sq mm
We will next solve for surface area of a 50 cents.
note: 2 cm = 20 mm
Surface Area = 2(π(d/2)^2) + πd x thickness
= 2(π(10)^2) + 20π x 1.5
= 2 (100π) + 30π
= 200π + 30π
= 230π
The surface area of a 50 cents is 230π sq mm.
Therefore, the ratio of the total surface area of $5 coin to 50 cents is
387.50π sq mm : 230π sq mm