Plotting the functions is highly recommended.
For A, the area under 
over the interval [1, 2] is the area of rectangle with height 3 and width 2 - 1 = 1, so the area is
For B, the area under 
plotted over the interval [0, 2] is the area of a triangle with height 1 and base length 2, so the area is
Answer:
I guess D is the answer for the question
The place value is a hundred thousand, as there are 5 digits following the eight.
Yes, Bobby will have enough money if he saves for 9 weeks. You can find this through either substituting w for 9 in the equation, or solving the equation itself.
Substituting:
Substitute w for 9.
Simplify.
Solve.
255 is greater than 250, so yes, he will have enough money saved.
Solving the equation:
Original Equation
Subtract 30 from both sides.
Divide both sides by 25.
The number of weeks he needs is 8.8. When rounding it up, you get 9.
When estimating, compatible numbers are numbers that are close in value to the actual numbers, and which make it easy to do mental arithmetic.
