Solve the problem.A person's hair length varies proportionately with the number of weeks it has been growing. If Fred shaved his head bald and his hair was 0.2 inches long after 4 weeks, how long would it be after an additional 12 weeks? Round to the nearest hundredth of an inch.
A. 2.40 in.
B. 3.20 in.
C. 0.60 in.
D. 0.80 in.
Answer: D
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Use a calculator to complete the table and using the table make a conjecture about the value of 25 / n as n approaches 0. n10.50.010.0010.00000125 / n
A. ?
| n | 1 | 0.5 | 0.01 | 0.001 | 0.000001 |
| 25 / n | ?50 | ?25 | ?25,000 | ?2500 | ?25000000 |
B. ?
| n | 1 | 0.5 | 0.01 | 0.001 | 0.000001 |
| 25 / n | 25 | 50 | 2500 | 25,000 | 25000000 |
C. ?
| n | 1 | 0.5 | 0.01 | 0.001 | 0.000001 |
| 25 / n | ?25 | ?2500 | ?50 | ?25000000 | ?25,000 |
D. ?
| n | 1 | 0.5 | 0.01 | 0.001 | 0.000001 |
| ?25 / n | ?50 | ?25 | ?2500 | ?25,000 | ?25000000 |
E. ?
| n | 1 | 0.5 | 0.01 | 0.001 | 0.000001 |
| ?25 / n | ?25 | ?2500 | ?50 | ?25,000 | ?25000000 |
Factor completely. If the polynomial is prime, say so.-3x2 + 30x - 75
A. Prime B. 3(x + 5)2 C. -3(x - 5)2 D. 3(x - 5)2
Solve the equation. Express radicals in simplest form.x2 - x = 56
A. {-7, 8} B. {1, 56} C. {7, 8} D. {-7, -8}
Determine where the graph of the function 
is concave upward and where it is concave downward. Also, find all inflection points of the function.
Select the correct answer. a. CU on (?2, 2), IP none b. CU on (??, ?2) and (2, ?), CD on (?2, 2), IP (?2, ?18) and (2, 18) c. CD on (?2, 2), IP none d. CU on (?2, 2), CD on (??, ?2) and , IP (?2, ?18) and (2, 18)