1. The amount, A (in liters), of oxygen used by a person's bloodstream varies directly with the amount, 1 (in liters) that is inhaled. At rest a normal person inhales about
12.5 liters of oxygen per minute, of which about 0.5 liters is absorbed by the blood
through the lungs and the rest is dispelled when the person exhales. The maximum
amount of oxygen that a person's body is capable of using is about 3.5 liters per
minute. At this rate, how much oxygen would be inhaled each minute?

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )