Find the area of a circle with diameter 2.2 mi to the nearest tenth.?

7 ⤊

2006-06-07 11:24:36 · 3 answers · asked by jennifer b 2 in Science & Mathematics ➔ Mathematics

radius = 2.2/2 = 1.1
A = 1.1*1.1*pi = 3.8

2006-06-07 11:29:23 · answer #1 · answered by MsMath 7 · 7⤊ 0⤋

Area of a circle is given by (pi)(r^2), where r is radius.
diameter = 2.2 mi
radius = diameter/2 = 2.2 mi/2 = 1.1 mi
Area = (pi)*(1.1mi)^2 = 3.8 mi^2

2006-06-07 18:47:01 · answer #2 · answered by organicchem 5 · 0⤊ 0⤋

A = pi * ((d^2)/4)
A = (((2.2)^2)/4)pi
A = (4.84/4)pi
A = 1.21pi
A = about 3.8mi^2

ANS : about 3.8mi^2

2006-06-07 22:02:33 · answer #3 · answered by Sherman81 6 · 0⤊ 0⤋