A door with width 4.20 has an arc as shown in the diagram. Find: a the radius of the arc, to the nearest cm b the length of the arc, to the nearest cm. 225° is the central angle

Step-by-step explanation:

The diagram is not given in this question, but we can proceed anyways.

from the problem statement we can observe that the radius of the arc is same as the width of the door

a. the radius is 4.2 cm

b. the length of the arc given that the central angle is 25°  can be gotten using the formula stated bellow

arc length = 2 π r *(∅/360)

substituting we have

arc length = 2*3.142*(225/360)

arc length= 6.284*0.625

arc length=3.92 cm

give more details

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w