Question

Jarron has a piece of chalk tied to the end of a

7 inch piece of string. He is drawing a circle using
the string as the radius. Which is the best
estimate of the area of the circle?
F. 153.86 in^2
G. 21.98 in^2
H. 38.47 in^2
J. 43.96 in^2

The 2 is suppose to be at the top​

Answer 1

F- 153.86 in²

Explanation:

Area = 3.14 × 7²

153.86 in²

Answer 2

Answer: A 24 cm piece of string is cut into two pieces , one piece is used to form a circle and the other piece is used to form a square.

How should this string be cut so that the sum of the areas is a minimum .

:

Let x = the circumference of the circle

then

(24-x) = the perimeter of the square

:

Find the area of the circle

find r

2*pi*r = x

r =

Find the area of the circle

A =

A =

A = sq/cm, the area of the circle

:

Find the area of the square

A = sq/cm the area of the square

The total area

At = +

Graph this equation, find the min

Min occurs when x=10.6 cm

cut string 10.6 cm from one end

Step-by-step explanation: Hope I help out alot (-: :-)