Determine ? in decimal degrees, 0° ? ? ? 90°. Round results to an appropriate number of significant digits.cot ? = 1.237
A. 38.950°
B. 34.830°
C. 38.95°
D. 34.83°
Answer: C
Mathematics
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Use a vertical format to find the product.x2 + 6x + 2
A. 15x5 + 90x3 + 30x B. 8x3 + 55x2 + 58x + 14 C. 8x3 + 7x2 + 42x + 14 D. 15x5 + 55x2 + 42x + 9
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Provide an appropriate response.What multiplication fact is illustrated by the rectangular area model? 
A. 2 × 
= 
B. 2 × 
= 
C. 2 × 
= 5
D. 
× 
= 
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Find all specified roots.Eighth roots of i.
A. cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
B. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
C. 1, -1 ,i, -i, 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
D. 1, -1, i, -i
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Solve the problem.How much pure acid should be mixed with 9 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 4.5 gal B. 22.5 gal C. 13.5 gal D. 36 gal
Mathematics