Given : On a coordinate plane,a curved line with 3 arcs, lab led f of x, crosses the x-axis at (negative 2,0), (negative 1,0), (1,0), and (3,0) and the y axis at (0, negative 6).
To find: f when x = 0. i.e. f (0).
Solution: since the graph has 3 arcs and 4 solutions, it can be visualized as the follows: Between each solution, the function has to increase and decrease giving arcs in between. 1. One of the arcs is between (negative 2,0) and negative (1,0) 2. Second arc is between (negative 1,0) and (1,0) -this arc cuts the y axis, since x= 0 lies between x= -1 & x=1- 3. Third arc is between (1,0) and (3,0) Therefore only the 2nd arc cuts the y axis It’s given that the curve cuts the y axis at (0, -6) That is when x= 0, f(0) =-6 Therefore the value of f (0) is -6 only.
Plot each point, connect in the given order, add parallel line segments to those already there, take the coordinates of the intersection and record as answer.
When you multiply by 10^-5, you're really multiplying by 0.00001. This multiplied by 8.3 is 0.000083. It also means that you just move the decimal place in 8.3 to the left five times, where you'll get the same answer.
This is the concept of proportionality, we are required to calculate for the number of hours two crews can use to paint the house altogether. Here proceed as follows; number of hours new crew can paint=12 hrs portion of work painted by new crew in 1 hour= 1/12
number of hours experienced crew can paint=6 hours Portion of work painted by experienced crew in 1 hour=1/6
Portion of work painted by the two crews altogether in 1 hour will be: 1/6+1/12=1/4
thus the total amount of hours that the two painters will take to paint will be: 4 hours