hi can you find a good 7th grade satisiics test I can take link it or hand make it it should be hard 7th grade

Suppose that x and y are both differentiable functions of t and are related by the given equation. use implicit differentiation with respect to t to determine startfraction dy over dt endfraction in terms of x, y, and startfraction dx over dt endfraction .

896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1