Write the following proportions.$85 is to $68 as $70 is to $56
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: C
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Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.a1 = 4, d = 0.8
A. an = 4n - 3.2; a20 = 76.8 B. an = 0.8n + 4; a20 = 20 C. an = 0.8n + 3.2; a20 = 19.2 D. an = 4n + 0.8; a20 = 80.8
Divide in the indicated base.
A. 416 B. 1516 C. 526 D. 516
Provide an appropriate response.Find the ratio of the area of a circumscribed circle of an equilateral triangle to the area of the inscribed circle. [Hint: The altitudes of an equilateral triangle intersect at the center of the inscribed circle. This point of intersection falls one third of the distance along each altitude moving from the base towards the opposite vertex.]
A. 
: 1
B. 
: 1
C. 2 : 1
D. 4 : 1
Evaluate the expression.
4
A. 16
B. 
C. - 
D. -16