I need answers please

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.