ANSWER

EXPLANATION
Let the top of the hopper be

Then, by the cosine rule,

We evaluate to get,



Take positive square root of both sides to get,

Answer:
The Answer is 20
Step-by-step explanation:
let's take wife's age as x
given,
(40 + x)/2 = 30
40 + x = 30*2
x = 60 - 40
x = 20
Answer: 1/2
Step-by-step explanation:
1/2 × 1/2 = 1/4
1/4 × 1/2 = 1/8
Fractions multiply on numerator and denominator
Then simplify
Answer:
The volume of a sphere with 6 inch radius is 36(pi) cubic inches or approximately 110 cubic inches.
Step-by-step explanation: