Answer:
A
Step-by-step explanation:
π=3.14159...
Full circle are 25π cm² = 25*3.14=78.5 cm²
Half 78.5 cm²/2 = 39.25 cm²
Answer:
3
Step-by-step explanation:
Answer:
r = 9/sin Ф or r = 9 csc Ф
Step-by-step explanation:
The polar form is represented as:
x = r cos Ф and
y = r sin Ф
We are given:
y = 9
Putting value in y = r sin Ф
9 = r sin Ф
=> r = 9/sin Ф
1/sin Ф = csc Ф
or, r = 9 csc Ф
3.5 hours: $10 because if a 1/2 hour equaled 1.25 : 3.5 hours would give you $7.75
