The original price is @42. To check, find 10% of $42, which is $4.2. Now just subtract $4.2 from the original price, $42, and you get $37.8
BCA = 45° BCD = 125°
ACD = 180- (45+125) ACD = 180 - 170 ACD = 10°
Answer:
5.333 \pi
Step-by-step explanation:
Given is a function exponential as

The region bounded by the above curve, y =0 , x=4 is rotated about x axis.
The intersection of curve with x axis is at x=0
The limits for x are 0 and 4
The volume when rotated through x axis is found by

Here a = 0 and b =4
volume = 
=
1. C
2. E
3. D
4. B
5. A
Hope this helps :)
Notice that

So

if
, and the answer would be C.