What seems to be the trouble? You've done everything correctly...
Sorry if this is in the wrong section I am not sure what this is categorized as. I have a problem regarding the equation for a straight line. I have the following question and solution but im really not sure if I am right to drop the units. Could anyone help please?
· The equation for a straight line is often used in science to find an unknown without reference to a graph. For a set of data for two quatities, A and B, where A is plotted on the x-axis and B on the y-axis, the gradient of the straight line is 2.3 × 10^{4}m s^{−1} and the intercept on the y-axis is 5.8 × 10^{4} m. Using the equation for a straight line (Book 3, Equation 7.12 ) as your starting point, determine the value for A when B = 6.2 × 10^{5} m. Show all your workings and give your answer in scientific notation and to two significant figures.
Y =mx + c
C = 5.8 × 10^{4} m
M= 2.3 × 10^{4}m s^{−1}
B = 6.2 × 10^{5} m
6.2 × 10^{5} = 2.3 × 10^{4} A + 5.8 × 10^{4}
6.2 × 10^{5} - 5.8 × 10^{4} = 2.3 × 10^{4} A
620000 – 58000= 23000 A
562000 = 23000 A
562000 = A
23000
24.434782608695652173913043478261 = A
A = 24 to 2 significant figures.