Answer:
He climbed 19 steps
Step-by-step explanation:
Let steps climbed in 9.5 seconds = z
If 24 steps = 12 seconds
then: z = 9.5 seconds
Using criss cross method
24 x 9.5 = 12 x z
228 = 12 z
z = 228/12
z = 19 steps
Answer:
1/2
Step-by-step explanation:
take change in X divided by change in Y values
A pentagon is a closed 5 sided polygon.
A regular polygon has all sides equal as well as all angles equal.
°The formula to find the sum of all angles of a polygon is = (n-2) ×180
So for a pentagon, n= 5
So the sum of all the angles must be (5-2)× 180= 3 × 180 = 540.
Now as it is a pentagon, it shall have 5 vertices.
So there are 5 angles in a pentagon and all must be equal.
Hence each interior angle must be 540/5 = 108
So for a regular polygon with 5 sides must have each interior angle = 108
area = pi x r^2
circumference = 2x pi x r or pi x d
1st one diameter = 9.5 cm
so radius = 9.5/2 = 4.75
area = 3.14 x 4.75^2 = 70.85 square cm
circumference = 3.14 x 9.5 = 29.83 cm
2nd one radius = 4
area = 3.14 x 4^2 = 50.25 square cm
circumference = 2 x 3.14 x 4 = 25.12 cm
A) x+0.25>-8
-0.25 -0.25
x>7.75
B) -1<x-10
+10 +10
9<x
