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When f(a) = a² + 2a + 5, what is the value of f(a + b)?

(A)a² + b² + 2ab + 5

(B) a² + b² + 2a + 2b + 10

(C) a² + b² + 2a + 2b + 5

(D) (a + b)² + a + b + 5

(E) (a + b)² + 2a + 2b + 5

In a certain school district, exactly 30% of the students come from families that have only one child. If there are 7,340 students in the district, how many do NOT come from families with only one child?

（A）220 （B） 514 （C） 2,202 （D） 5,138 （E） 7,120

Correct Answer: D

MicroCorp will hold its annual company picnic next week and will assign 3 planning duties to its employees. One person selected will reserve a venue, another will arrange catering, and a third will plan activities. There are 10 employees eligible to fulfill these duties, and no employee can be assigned more than one duty. How many different ways are there for duties to be assigned to employees?

(F) 7³ (G) 9³ (H) 10³ (J) 9 · 8 · 7 (K) 10 · 9 · 8

Correct Answer: K

Jackson worked 25 hours and received $225. At the same rate of pay, how much would he make if he worked 40 hours?

(A) $300(B) $325(C) $350(D) $360(E) $400

Correct Answer: D