The exact circumference of a circle is 30rr . What is the diameter?

Mathematics

2 answers:

Leokris [45]3 years ago

6 0

The diameter of a circle that has a circumference of 30 inches would be around 9.5 inches- hope this helps!!

bija089 [108]3 years ago

4 0

It would be 9.5!!!!!!

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Alla [95]

Mel took 8 more strokes b/c

-6+6=0

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7 0

4 years ago

In isosceles triangle the length of the base is twice shorter than the length of a leg. The perimeter of this triangle is 50cm.

weqwewe [10]

X -<span> length of a leg

1/2*x</span> - <span>length of the base

so:

$P=2\cdot x+\dfrac{1}{2}x\\\\\\50=2x+\dfrac{1}{2}x\\\\\\50=2\dfrac{1}{2}x\\\\\\50=\dfrac{5}{2}x\quad|\cdot\dfrac{2}{5}\\\\\\x=50\cdot\dfrac{2}{5}\\\\\\x=\dfrac{100}{5}\\\\\\\boxed{x=20\text{ cm}}\qquad\qquad\text{(leg)}$

and

$\dfrac{1}{2}\cdot x=\dfrac{1}{2}\cdot20=\boxed{10\text{ cm}}\qquad\qquad\text{(base)}$
</span>

3 0

4 years ago

How many gallons of pure water should be evaporated from 160 gallons of a solution containing 12% salt

AfilCa [17]

Answer:

66 gallons

Step-by-step explanation:

Given that initially 160 gallons of a solution containing 12% salt.

So, the initial amount of salt = 12% of 160 = 12/100 x 160 = 19.2 gallons.

Let x gallons of water get evaporated so that the remaining solution contains 20% salt.

The remaining amount of solution = 160-x gallons.

As the initial amount of salt is still in the solution which is equal to 20% of the remaining solution, so

19.2 = 20% of (160-x)

$\Rightarrow 19.2 = \frac {20}{100}\times (160-x) \\\\\Rightarrow 19.2 = \frac {1}{5}\times (160-x) \\\\\Rightarrow 19.2 \times 5= 160-x \\\\\Rightarrow 96= 160-x \\\\\Rightarrow x= 160-96 \\\\$