There are 12 fifth-grade students and 18 sixth-grade students in a mixed-grade class. What is the ratio of fifth-grade students to all the students in the class?

A. 2:3

B. 2:5

C. 3:2

D. 5:2

THIS IS FOR A TEST!!!

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

For what value of (y) is 3^3/3^y =1/9

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )