Answer:
R
Step-by-step explanation:
Answer:70%
Step-by-step explanation: Convert the fraction to a decimal, then multiple by 100.
A = pi × r²
A = pi × 13²
A = 530.93 km²
x ^ 2 = 144
x = 12, x = -12
Check:
12 * 12 = 144
-12 * -12 = 144