Maths-
SAT
Easy
Question
The budget for a school band was $8,000 in 2010. The budget decreased by 15% from 2010 to 2011 and then increased by 22% from 2011 to 2012. Which of the following expressions represents the budget, in dollars, for the school band in 2012?
- (1.15)(1.22)(8,000)
- (0.85)(1.22)(8,000)
- (1.15)(0.78)(8,000)
- (0.85)(0.78)(8,000)
The correct answer is: (0.85)(1.22)(8,000)
Actual budget in 2010 = 8000
The budget decreased by 15% from 2010 to 2011,
Budget in 2011 = 
= (0.85) 
8000
The budget is increased 22% from 2011 to 2012
Budget in 2012 = 
= (0.85) (1.22) (8000).
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The velocity v, in meters per second, of a falling object on Earth after t seconds, ignoring the effect of air resistance, is modeled by the equation v = 9.8t. There is a different linear relationship between time and velocity on Mars, as shown in the table below.
|
Time (seconds) |
Velocity on Mars (meters per second) |
|
0 |
0 |
|
4 |
14.8 |
|
8 |
29.6 |
The velocity v, in meters per second, of a falling object on Earth after t seconds, ignoring the effect of air resistance, is modeled by the equation v = 9.8t. There is a different linear relationship between time and velocity on Mars, as shown in the table below.
|
Time (seconds) |
Velocity on Mars (meters per second) |
|
0 |
0 |
|
4 |
14.8 |
|
8 |
29.6 |
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|
Data set A |
25,550 |
40,430 |
49,150 |
62,590 |
73,670 |
118,780 |
126,040 |
|
Data set B |
22,860 |
55,020 |
173,730 |
300,580 |
358920 |
456,170 |
603,300 |
data sets in the table above?
|
Data set A |
25,550 |
40,430 |
49,150 |
62,590 |
73,670 |
118,780 |
126,040 |
|
Data set B |
22,860 |
55,020 |
173,730 |
300,580 |
358920 |
456,170 |
603,300 |
data sets in the table above?
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|
Roof type |
||||
|
|
Asphalt shingle |
Slate |
Cedar shake |
Total |
| Single story |
9 |
4 |
2 |
15 |
| Two story |
20 |
10 |
3 |
33 |
| Total |
29 |
14 |
5 |
48 |
|
Roof type |
||||
|
|
Asphalt shingle |
Slate |
Cedar shake |
Total |
| Single story |
9 |
4 |
2 |
15 |
| Two story |
20 |
10 |
3 |
33 |
| Total |
29 |
14 |
5 |
48 |
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