A garden fertilizer contains 15% by mass of nitrogen. The recommended usage is 30g of fertilizer per 10dm^3 of water. What is the concentration of nitrogen in this solution? a)0.15 g dm^-3 b)0.30 g dm^-3 c)0.45 g dm^-3 d)3.00 g dm^-3
The variables x and y are related by the equation y=ax/(x-b),where a and b are constants .When y is plotted against y/x ,a straight line is obtained .The line has gradient 3 and y-intercept 2. (i)Find the values of a and b (ii)Find the values of x which x=y
Can be more specific? still do not understand ... The answer for part (ii) should be y=7.4(0.2)^2 and the values of q is o.2 ..
A diagram shows a straight line graph of In y against x,passing through the point (0,2) and having gradient -3/2 . The variables x and y are connected by the equation y=pq^x ,where p and q are constants Find (i)the value of p and of q ,to one decimal place (ii)the equation rel...
1.Express (xe^x)^2=30e^(-x) in the form lnx=ax+b,and find the value of a and of b . 2.solve 4(3^2x)=e^x
Do you have the story animal senses
solve each system by elimination 9x-6y=-30 x-3y=6
write a 4-digit number with a 0 in the hundreds place and a 0 in the tens place.Now write another number,using the same four digits and tell which number is larger.
principles of physics
You go to SS?