Provide an appropriate response.Find the circumference of the given circle. 
A. circumference: 25.13 cm2
B. circumference: 25.13 cm
C. circumference: 12.57 cm
D. circumference: 12.57 cm2
Answer: B
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The functional notation 
means the function whose name is 
evaluated at 
style="vertical-align: middle;" />. Answer the following statement true (T) or false (F)
Simplify the expression, and combine like terms.7(5x2 + 9y) - (4x2 - 3y)
A. 39x2 + 66y B. 31x2 + 60y C. 39x2 + 12y D. 31x2 + 66y
Solve.In a state with a population of 7,000,000 people, the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Write your answer in scientific notation.
A. $42 × 1010 B. $4.2 × 109 C. $42 × 1011 D. $4.2 × 1010
Solve the problem.Given that the polar equation r = 
models the orbits of the planets, estimate the closest approach of Pluto's orbit, for which 
and 
to the sun.
A. About 74 astronomical units B. About 30 astronomical units C. About 39 astronomical units D. About 50 astronomical units