We want to study a general product, and find information about the ones place.
We will see that the ones place is always zero.
We have the expression:
10×?
Where ? can be any number between 1 and 9 (only whole ones)
What is true about the digit of the ones place (the first digit at the left of the decimal point) in each product?
Let's give ? some different values and see what happens:
10×1 = 10
10×2 = 20
10×3 = 30
etc...
We can see that the ones place will always be equal to zero.
If you want to learn more, you can read:
brainly.com/question/16552177
Answer:
6 cms.
Step-by-step explanation:
If the side of an equilateral triangle is 2x cm then its height is √3x and its base is 2x.
Area = 1/2 * base * height
9√3 = 1/2 * 2x * √3x
9√3 = x * √3x
9 = x^2
x = 3
So length of each side = 2*3 = 6.
x = 9
Calcualate 40% (0.40) times 20 to get that there are 8 boys in the class. The rest must be girls, so 20 - 8 gives you 12 girls. 25% (0.25) times the 8 boys gives you that 2 of the boys wear glasses. 50% (0.5) times the 12 girls tives you that 6 girls wear glasses. Add together the 2 boys and the 6 girls that wear glasses to get that a total of 8 students wear glasses.
The area of the sector is given by the equation,
A = πr²(x / 360°)
where x is the number of degrees in the figure.
25π ft² = (πr²)(60/360)
The value of r is 12.25 ft. Then, we use this value to calculate for the circumference of the sector.
C = 2πr(x/360)
Substituting,
C = 2π(12.45)(60/360)
C = 12.83 ft³
