Answer:
2.82
Step-by-step explanation:
.15 x 18.80 = 2.82
Answer: acute
Step-by-step explanation: it is less than 90 degrees so it is less the right angle
Parameterize the part of the sphere by
with
and
. Then
So the area of
(the part of the sphere above the cone) is given by
She spent 5.4 on tip so her overall total is $41.40