Answer
the second one, and 5th one
Step-by-step explanation:
because it is liquid
10t+50=100
-50 -50
10t=50
10t/10=50/10
t=5
The equation which represent total amount of income he earns from selling book is, 
Since, Selling price of one novel is n dollars
So, selling price of b books is, 
Since, he receives 9% commission on each book sale.
So, total commission he receives on selling of b books is,

And also he received a bonus of $50,000 to sign the contract to write the book,
So, total amount of income he earns is represented by A,

Learn more:
brainly.com/question/7852218
Answer:
17.51
Step-by-step explanation:
Notes: Circumference= 2 times pi times r
Diameter is double the radius (2r)
How to solve: You just need to divide 55 feet by pi
2(pi)(r)/( pi) = 55/(pi)
2r = 17.51
diameter = 17.51
Answer:
1
Step-by-step explanation: