Chemistry: What is true of a physical change? 1) results in a rearrangement of the elements that make up the substance 2) results in a substance that is still the same substance 3) results in a substance with completely different physical properties 4) results in a new substance that is not the same substance

What is true of a physical change? 1) results in a

audrey435

31.01.2021

$r = 6\sqrt{3}$

Step-by-step explanation:

Area of the shaded section = θ/360*πr²

Area = 15π m²

θ = 360° - 310° = 50°

r = ??

If in the values into the equation and solve for r

15π = 50/360 × π × r²

$15 \pi = \frac{5 * \pi * r^2}{36}$

Multiply both sides by 36

$15 \pi * 36 = \frac{5\pi * r^2}{36}*36$

$540 \pi = 5\pi * r^2$

Divide both sides by 5π

$\frac{540 \pi}{5\pi} = \frac{5\pi * r^2}{5\pi}$

108 = r^2

$r = \sqrt{108}$

$r = \sqrt{36*3}$

$r = 6\sqrt{3}$

0,0(0 оценок)