5p coins weigh approximately 3 grams what would be the weight of the £5 worth of 5p coins give your answer in kilograms

Given that (x-3) is a factor of f(x)=x^3+ax^2-x-6, find a and hence the number of real roots or the equation f(x)=0

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?