Final Exam Review

What is the amplitude of y = 3 cos 2x?

• 3
• 2
• 90
  90⁰
• 350⁰

What is the period of
y= -3sin(x)

• π
• 2π
• 3π
• 4π

What is the amplitude of the graph? 

• 1
• 3
• 6
• 9

Tags

CCSS.HSF-IF.C.7E

Simplify: 
(7 + 2i)(9 - 6i)

• 75-24i
• 63 - 24i  - 12i²
• 51 - 24i
• 58 + 60i

Tags

CCSS.HSN.CN.A.2

i¹³

• -1
• 1
• i
• -i

(1-3i)(2+5i)

• 22-i
• 16-i
• 17-i

How many outfits are possible with 5 pairs of jeans, 8 t-shirts, and 2 pairs of shoes?

• 15
• 40
• 80
• 10

A fruit basket contains:
9 apples, 3 bananas, 7 oranges, 5 pears, and 1 grapefruit. Kyle randomly chooses a fruit, does not replace it, then chooses another. What is the probably that he chose two pears? 

• 9/49
• 4/125
• 1/10
• 1/30

A chorus has 50 girls and 35 boys. If two are chosen at random to sing a duet, what is the probability that both will be boys? 

• 1/6
• 7/17
• 3/8
• 13/25

A tennis player makes a successful first serve 48% of the time.  If she serves 8 times, what is the probability that she gets exactly three first serves in?  Assume the serves are independent.

• 0.2355
• 0.1275
• 0.7645
• 0.0042