Answer:
B, C, E
Step-by-step explanation:
Tips = $20 × 15%
$20 ×
$3
Total = $20
Without tips = $17
Things that can buy for $17 are B, C, E
a. 254.34, b. 56.52
a. A = πr^2,
A = 3.14(9^2)
A = 3.14*81
A = 254.34
b. C = πd
C = 18*3.14
C = 56.52
30
-1/3 a + 4 ≤ 0
3*(-1/3a) + 4*3 ≤ 0*3
-a + 12 ≤ 0
12 ≤ a
12 ⩾a
a⩾12
