望高人输血~~！！困扰很久了~~

Jolie881209

1。 A total of $60,000 was invested for one year.But of this amount earned simple annual interest at the rate of x percent per year, and the rest earned simple annual interest at the rate of y percent per year.If the total interest earned by the $60,000 for that year was $4,080, what is the value of x?
(1)x = (3/4) y
(2)The ratio of the amount that earned interest at the rate of x percent per year to the amount that earned interest at the rate of y percent per year was 3 to 2.
答案是c


Q29:
The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998.Was the annual rent collected by the corporation from the building more in 1999 than in 1997?
(1)x > y
(2)
xy/100< x – y
答案b

3。



Yesterday each of the 35 members of a certain task force spent some time working on project P.The graph shows the number of hours and the number of members who spent that number of hours working on project P yesterday.What was the median number of hours that the members of the task force spent working on project P yesterday?
答案是6


4.
The circle shown has center R.If arc UST has length 48π, what is the radius of the circle?
5.

The figure above represents a square garden that is divided into 9 rectangular regions with indicated dimensions in meters.The shaded regions are planted with peas, and the unshaded regions are planted with tomatoes.If the sum of the areas of the regions planted with peas is equal to the sum of the areas of the regions planted with tomatoes, what is the value of x?答案是1.5，[我做出来跟答案不一样的]


7.


答案是a