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1. |
Express 0.0000421 in scientific notation. |
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A. |
4.21 × 10-4 |
B. |
4.21 × 10-5 |
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C. |
4.21 × 10-6 |
D. |
4.21 × 10-9 |
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Hint |
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2. |
Evaluate  . Express the result in scientific notation. |
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A. |
80 × 10-8 |
B. |
8.0 × 10-7 |
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C. |
0.8 × 10-8 |
D. |
8.0 × 10-9 |
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Hint |
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3. |
Find  . |
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A. |
-14 |
B. |
15 |
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C. |
14 |
D. |
-15 |
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Hint |
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4. |
Determine whether the number  is rational or irrational. |
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A. |
irrational |
B. |
neither |
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C. |
rational |
D. |
both |
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Hint |
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5. |
The graph of a linear function is _______. |
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A. |
a horizontal line only |
B. |
None of these is correct |
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C. |
a straight line |
D. |
a curved line |
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Hint |
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6. |
If a rocket is fired from the ground with an initial velocity of 75 meters per second, then the height of the rocket after t seconds is h = 75t - 4.9t2. Find the height of the rocket after 3 seconds. |
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A. |
252.5 meters |
B. |
221.6 meters |
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C. |
130.4 meters |
D. |
180.9 meters |
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Hint |
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7. |
Simplify  . |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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8. |
What is the equation of a line that has a slope of 4 and passes through (6, 3)? |
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A. |
y = 4x – 27 |
B. |
y = 4x – 7 |
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C. |
y = 4x – 3 |
D. |
y = 4x – 21 |
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Hint |
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9. |
Write the equation in slope-intercept form.
–6x = –10 – 2y |
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A. |
y + 8 = 3(x + 1) |
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B. |
y = 3x + 8 |
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C. |
–6x + 2y + 10 = 0 |
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D. |
y = 3x – 5 |
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Hint |
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10. |
Find the graph of y = x2 + 1. |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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11. |
What is the lowest point on the graph of y = x2 + 2? |
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A. |
(0, 2) |
B. |
(2, 0) |
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C. |
(0, –2) |
D. |
(0, 0) |
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Hint |
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12. |
Which equation is in the same family as y = x2? |
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A. |
y = 2x – 3 |
B. |
y = 2x2 – 3 |
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C. |
y = x3 – 3 |
D. |
y = x2 – 3 |
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Hint |
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13. |
What is a conjecture? |
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A. |
an educated guess that hasn't been proved yet |
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B. |
a ''shot in the dark'' guess that hasn't been proved yet |
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C. |
an educated guess that has been proved |
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D. |
a ''shot in the dark'' guess that has been proved |
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Hint |
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14. |
What is true of the second differences for the equation x2 – 6x + 12? |
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A. |
they decrease by 1 |
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B. |
they increase by 1 |
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C. |
they are constant |
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D. |
they increase by 12 |
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Hint |
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15. |
Which differences are constant in a cubic equation? |
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A. |
first |
B. |
third |
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C. |
second |
D. |
fourth |
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Hint |
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16. |
How many counterexamples are needed to prove a conjecture wrong? |
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A. |
1 |
B. |
2 |
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C. |
4 |
D. |
3 |
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Hint |
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17. |
Which number is not equal to the other three? |
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A. |
 |
B. |
 |
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C. |
2-2 |
D. |
 |
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Hint |
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18. |
The population of fish in Mark's lake is 500 this year. If the population increases by 6.9% a year, what number can Mark multiply this year's population by to estimate the fish population in the lake next year? |
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A. |
0.0931 |
B. |
6.9 |
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C. |
1.69 |
D. |
1.069 |
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Hint |
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19. |
Suppose your parents buy a new car for $21,000. What will the value of the car be in 5 years if the car depreciates by 10% each year.? |
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A. |
$11,160 |
B. |
$15,309 |
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C. |
$12,400 |
D. |
$10,044 |
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Hint |
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20. |
Which curve represents exponential decay? |
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 |
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A. |
curve c |
B. |
curve a |
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C. |
curve d |
D. |
curve b |
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Hint |
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