Which property would be useful in proving that the product of two rational numbers is always rational?
a) a/b + c/d = ad + bc/bd
b) a + b/cd = a/cd + b/cd
c) a/b * c/d = ac/bd
d) a/b ÷ c/d = a/b * d/c

Question 13 (1 point) jerome is starting a new job. his contract states he will earn $42,000 the first year, and will get a 4% raise per year. which function s(x) represents jerome's salary after a certain number of years, x?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Which number can each term of the equation be multiplied by to eliminate the decimals before solving? 5.6j- 0.12=4+1.1j