If sin x = 0.3 , what is the value of cos x

Find the smallest number by which the given number should be divided to make a perfect cube(with steps or the answer will get reported) a.108 b.2187

Plz hurry evaluate the expression a+b where a=8 and b=19

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is