Jessi wants to buy fencing to place around a new semicircle dog park in her neighborhood. The diameter of the semicircle is 30 feet. How much fencing will Jessi need if she wants to enclose the whole dog park? Use 3.14 for pi. a 2826 ft
b 47.1 ft
c 94.2 ft
d 706.5 ft

C

Step-by-step explanation:

If you multiply the diameter by pi you get the circumference

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.

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.