Express each set in interval notation.
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Mathematics
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Write the phrase as a mathematical expression. Use x as the variable.The sum of a number and 15
A. 15x
B. x + 15
C. 
D. x - 15
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors. log3
A. 
log313 - 2 log3y - log3x
B. 5 log313 - 2 log3y - log35
C. log313 - log3y - log3x
D. 
log313 - 2 log3y - 2 log3x
Mathematics
Solve the problem.A formula for calculating the distance, d, that can be seen from an airplane to the horizon is 
where x is the altitude of the plane in feet. Find d when the altitude is 10,975 feet. Round your answer to the nearest hundredth.
A. 127.81 feet B. 105.98 feet C. 227.81 feet D. 6694.75 feet
Mathematics
Find a value of k that will make f a probability density function on the indicated interval.f(x) = kx2; [-1, 4]
A. 
B. 
C. 
D. 
Mathematics