Solve with calculator.The formula 
models the duration of a storm, D, in hours, in terms of the diameter of the storm, x, in miles. Use a calculator to determine the duration of a storm with a diameter of 7 miles. Round to the nearest hundredth.
A. 0.19 hours
B. 1.3 hours
C. 0.34 hours
D. 18.52 hours
Answer: B
Mathematics
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Evaluate the integral.
A. 10 cosh (4x - 2) + C
B. 
cosh (4x - 2) + C
C. 
cosh 4x + C
D. 40 cosh (4x - 2) + C
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Find the position vector of a particle that has the given acceleration and the given initial velocity and position.
a(t) = -4k, v(0) = i + j - 20k, r(0) = 4i + 9j
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Add and, if possible, simplify.
x + 
x
A. 
B. 
C. 
x
D. 
x
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Write the expression using exponents.(b + c)(b + c)(b + c)
A. (b + c)3 B. 3b + 3c C. b3 + c3 D. 3(b + c)
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