Divide.
A. -11i
B. 11
C. 11i
D. -11
Answer: C
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Use the decibel scale to answer the question.How does the intensity of sound from a concert speaker at a distance of 20 meters compare to the intensity at a distance of 60 meters?
A. Factor of 3 weaker at 60 m. B. Factor of 36 weaker at 60 m. C. Factor of 30 weaker at 60 m. D. Factor of 9 weaker at 60 m.
Solve the problem.Brett has saved $596 at the bank. He wants to save $2160 for a trip to Alaska. What percent of his goal has been reached?
A. 3.6% B. 27.6% C. 36% D. 2.8%
Rewrite as a fraction.142
%
A. 14
B. 2
C. 
D. 1
Solve the problem.There are four people in Ethan's family, one adult and three children aged 4, 8, and 11. The family decided to join an aquatic center. Adult memberships are $60 per adult and children's memberships are $20 per child if the child is 5 years old or younger. How much will the family have to pay in membership fees?
A. $200 B. $240 C. $160 D. $120