Math
posted by chaya .
The variable d represents the cost of a customer's meal, in dollar. The following expression represents the amount paid, including tax.
d + 0.18d
F. The cost plus eighteen percent of the cost
G. the cost minus eighteen percent of the cost
H. the cost plus eight percent of the cost
J. The cost plus one hundred eighteen percent of the cost
I think the answer is F.
I really don't get this question
A merchant spend $92 to buy a calculator
then the merchant sold it with a 21% markup. Katherine used her calculator and found the amount of the markup to be $9.
Explain how you can use estimation to check the reasonableness of Katherine's
calculation
part B
Without doing calculation, tell whether or not Katherine's calculation is reasonable explain your answer
I really don't get this question can u help me

Math 
Ms. Sue
Your first answer is right.
If you take 20% of 100, you'll get $20. It looks like Katherine's estimate is way off. 
Math 
Ms. Sue
Another way to approach this problem is to look the relationship between 9 and 90. 9 is 10% of 90, right?

Math 
chaya
thanks your great

Math 
Ms. Sue
You're very welcome. :)
Respond to this Question
Similar Questions

accounting
# 1 Takers,Inc.provide the following results: 2004 2003 Units 2,400 3,000 Total Cost 19,200 24,000 What form of cost behavior is the cost above? 
math
An advertisement states that eight thermometers cost $12.42 minus a 3% discount. Dr. wants to order a dozen to take advantage of the savings, sales tax is 5%. What would the cost be? 
math
Laura want to purchase 4 shirts and 3 hat the cost of each shirt at Wm is$15.20.the cost of the hat at Wm is $5.200 the cost of the same shirt at Sm is 5 percent more than the cost at Wm the cost of the same hat at Sm is 2 percent … 
finance
The Nutrex Corporation wants to calculate its weighted average cost of capital. Its target capital structure weights are 40 percent longterm debt and 60 percent common equity. The beforetax cost of debt is estimated to be 10 percent … 
epoka university
1) The cost that is related to the particularly cost object and can be traced to it in an economically feasible (costeffective) way is called: o Indirect cost o Cost tracing o Direct cost o Variable cost 
Math
Dr. Michael Lewis bought a bike that cost $455 plus 7 1/2 percent sales tax. Find the final cost 
Finance
a firm wants to create a weighted average cost of capital (WACC) of 10.4 percent. The firm's cost of equity is 14.5 percent and its pretax cost of debt is 8.5 percent. The tax rate is 34 percent. What does the debt weight need to … 
C++
Write a complete, working program that will do the following: Suppose you want to write a program to calculate the total cost of an item that has sales tax added. If a given item costs 14.97, and the tax rate is 6.7%, display the following … 
Finance
Jungle, Inc., has a target debt−equity ratio of 0.84. Its WACC is 11.5 percent, and the tax rate is 34 percent. Required: (a) If Jungle's cost of equity is 14.5 percent, its pretax cost of debt is percent. (b) If instead you … 
c programming
write a program that computes tax and tip on a restaurant bill for a patron with rs.44.50 per meal charge.the tax should be 6.75 percent of the meal cost.the tip should be 15 percent of the total after adding the tax.display the meal …