Solve the given differential equation.x dy + y dx - 4x y3 dy = 0
A. ln xy - 
y3 = 0
B. ln xy - 
y3 = c
C. ln xy - 4y3 = c
D. ln xy + 
y3 = c
Answer: B
Mathematics
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Solve the problem.The amount of money (in thousands of dollars) that Americans spend yearly at coffee retailers has increased greatly. 
Let D be the amount (in thousands of dollars) Americans have spent on coffee every year since 2014. A model for the situation is 
How much money will Americans spend on coffee in the year 2027?
A. $235,000 B. $2350 C. $235 D. $23,500
Mathematics
Construct a truth table for the statement.(p ? ~q) ? r
A. 
| T | T | T | F | F | F |
T F T T T T
T F F T T F
F T T F F F
F T F F F F
F F T T F F
F F F T F F
B.
| T | T | T | F | T | T |
T F T T F F
T F F T F F
F T T F T T
F T F F T F
F F T T T T
F F F T T F
C.
| T | T | T | F | F | F |
T F T T F F
T F F T F F
F T T F F F
F T F F F T
F F T T T T
F F F T T T
D.
| T | T | T | F | F | T |
T F T T T T
T F F T T F
F T T F F F
F T F F F T
F F T T F T
F F F T F T
Mathematics
Multiply.(-13) × -17
A. 234 B. -234 C. 238 D. 221
Mathematics
In the diagram below, the sum of the numbers in any 2 small circles is the number in the large circle between them. Complete the diagram so that the same pattern holds.
A. 
B. 
C. 
Mathematics