Answer:
11.31
Step-by-step explanation:
<h3>given:</h3>
The diameter of the circle is 3.6 units.
<h3>to find:</h3>
Value of "a"
<h3>steps</h3>
Circumference of a circle in terms of radius:
Circumference = 2 · π · r = 2 · 3.14 · 1.8 = 11.31 (*)
In terms of diameter:
Circumference = π · d = 3.14 · 3.6 = 11.3 (*)
In terms of area:
Circumference C = √4·π·A = √4·π·10.18 = 11.31 (*)
Answer:
B and D
Step-by-step explanation:
5% of 35 can be represented as 5% 
.
To find equations that make this work, we need to find different ways to represent 5%.
5% can be represented as fraction - over 100. The percentage over 100 will be equal to the percent.
So, 
. Multiplying by 35 gets us 
This means that Choice B is correct.
Another way to represent 5% is as a decimal.
We already know that the fraction form of 5% is . This means that in the decimal, the number 5 will be two place values to the right of the decimal place.
0.<u>0</u><u>5</u>
So the decimal expansion of 5% is 0.05. Multiplyin by 35 get us 
, so choice D works too.
Hope this helped!
Answer:
B. 6,8,10
Step-by-step explanation:
to find a right triangle the equation: a^2 + b^2 = c^2, so just plug each number in to see.
6^2 + 8^2 = !0^2
36 + 64 = 100
100 = 100
Personally i knew almost immediately because 3,4,5 are the most common right triangles example and 6,8,10 are just a x2 of them so yea.
Answer:
0.51km × 1000 = 510m
510m × (3×7) = 510m × 21 = 10710m in whole
Step-by-step explanation:
first we transform km to m (multiply by 1000)
then we count how much days are in three weeks ( 3 weeks × 7 days)
then we just multiply the meters per day × the days
99% it's true
Let x = your number.
6x = x^2 - 27. Subtract 6x from each side.
0 = x^2 - 6x - 27. Factor
0 = (x-9) (x+3). Set each term equal to zero
(x+3) = 0. Subtract 3 from each side.
x = -3. This is the negative solution.
(x-9) = 0. Add 9 to each side.
x = 9. This is the positive solution.
