|
181215
|
Last year, the price of a commodity was 12% higher than the cost. This year, the price is 247 dollars, which is 30% higher than the cost. The cost is the same in these two years. What's the price of the commodity last year?
|
|
181215
|
f(x)=$$\frac{z}{x}$$.The definition domain of $$x_1$$,$$x_2$$ is the range of f(x). Is f$$(x_1)$$ less than f$$(x_2)$$ when $$x_1$$<$$x_2$$?
1:$$x_1$$>0
2:z > 0
|
|
181215
|
Alex went to UK, Netherland and Australia on business last month. His roaming phone charges in UK, Netherland and Australia were $0.1/minute, $0.2/minute, and $0.3/minute, respectively. What's the unit price of his roaming phone charges last month?
1: The ratio of his roaming call in UK, Netherland, Australia was 2:3:4.
2: He spent 27000 minutes on roaming calling last month.
|
|
181215
|
Someone started doing experiments at midnight. Each experiment took the same time, and the next experiment was start immediately after each experiment. She used hhmm to record the time. For example, she recorded 1:30 as 0130. When she finished her first experiment, she recorded 0014. What was the four-digit number she recorded when finishing the 18th experiment?
|
|
181215
|
f(x)=$$\frac{4x^{2}-1}{1-2x}$$,$$\frac{f(\sqrt{3})-f(\sqrt{2})}{\sqrt{3}-\sqrt{2}}$$=?
|
|
181215
|
The budget for someone's meal is $6 plus 5% tax. In fact, he only spent $5.67. How many percents is the actual cost less than the budget?
|