Find the circumference and area of a circle of radius 4.2cm. plz help me today is a due date.

The circumference of the circle is 26.4 cm

The area of the circle is 55.44 cm²

Step-by-step explanation:

The circumference of the circle C = 2πr

The area of the circle A = πr²

r is the radius of the circle

∵ r = 4.2 cm

→ Substitute it in the first rule to find the circumference

∵ C = 2πr

∵ π =

∴ C = 2 ×   × 4.2

∴ C = 26.4 cm

∴ The circumference of the circle is 26.4 cm

∵ A = πr²

∵ r = 4.2 cm

∵ π =

→ Substitute them in the second rule to find the area

∵ A = × (4.2)²

∴ A = 55.44 cm²

∴ The area of the circle is 55.44 cm²

step-by-step explanation:

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.