Factor completely.x4 + 3x2 - 70
A. (x2 - 10)(x2 + 1)
B. (x2 - 7)(x2 - 10)
C. (x2 - 7)(x2 + 10)
D. (x2 - 10)(x2 + 7)
Answer: C
Mathematics
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Solve the problem.One half of a number is 3 more than one-sixth the same number. What is the number?
A. 8 B. 12 C. 9 D. 18
Mathematics
Solve the problem.A sample of 200 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 40 years? Round your answer to the nearest whole gram.
A. 0 grams B. 1 gram C. 2465 grams D. 58 grams
Mathematics
Simplify.
A. 
B. 
C. 
D. - 
Mathematics
Find all solutions of the equation. Leave answers in trigonometric form.x2 + 1 - 
i = 0
A. {2 cis 90°, 2 cis 270°}
B. {2 cis 45°, 2 cis 225°}
C. {
cis 60°, 
cis 240°}
D. {2
cis 90°, -2
cis 270°}
Mathematics