Find the product and write the result in standard form.(-9 - 6i)(5 + i)
A. -39 - 39i
B. -51 + 21i
C. -39 + 21i
D. -51 - 39i
Answer: A
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Solve the equation. Check your solution.
+ 
= 
- 5
A. 
B. 
C. 
D. 
Solve the problem.The half-life of a certain radioactive substance is 20 years. Suppose that at time 
there are 30 g of the substance. Then after t years, the number of grams of the substance remaining will be N(t) = 30(1/2)t/20. How many grams of the substance will remain after 80 years?
A. 0.47 g B. 0.23 g C. 1.88 g D. 0.94 g
Solve the problem. Use 3.14 for ?, if necessary.A circular fountain has a diameter of 31 ft. Approximate the distance around the fountain.
A. 48.67 ft B. 97.34 ft C. 3017.54 ft D. 194.68 ft
A certain mail order outlet uses a container in the shape shown below. Ignoring the flaps used to secure the sides together, describe and sketch the shape of the box when it is unfolded.
