Mathematics: The length of minute hand on a wall clock is 14cm. find the areas swept by the minute hand in 30min

Hi there!To find the x-intercept of the function we need to calculate f(x) = 0.Rule AB = 0, gives A = 0 or B = 0.Add 4 to both sides or subtract 2 from both sides. Hence, the solutions are:(4, 0) & (-2, 0)...

The length of minute hand on a wall clock is 14cm.

Ответ:

J3ak06

12.03.2022

Mathematics

In 30 minutes the minute hand makes half a turn around the clock, so it sweeps half a circle.

Given the radius , the area of a circle is $A = \pi r^2$

In this case, we're interested in half the area of a circle with radius 14cm, so we have

$A^* = \dfrac{\pi \cdot 14^2}{2} = \dfrac{196\pi}{2} = 98\pi$ cm squared.

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Ответ:

karinahelpz1008

25.07.2022

Mathematics

Hi there!

To find the x-intercept of the function we need to calculate f(x) = 0.

(x - 4)(x + 2) = 0

Rule AB = 0, gives A = 0 or B = 0.
$x - 4 = 0 \: \: \: or \: \: \: x + 2 = 0$

Add 4 to both sides or subtract 2 from both sides.
$x = 4 \: \: \: \: \: \: \: \: \: \: or \: \: \: x = - 2$

Hence, the solutions are:
(4, 0) & (-2, 0)

0,0(0 оценок)

The length of minute hand on a wall clock is 14cm. find the areas swept by the minute hand in 30min

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