Potatoes cost £2 per kg. Carrots cost £3 per kg.
Alfred buys p kg of potatoes and c kg of carrots.
The total cost is £T.
Write down a formula for T in terms of p and c.

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

If np3 /nc2 = 6, find the value of n