If the half-life of a substance is 2 days, what is the amount of substance left at the end of 4 days?

What operation does the expression x + 5 involve?

Actual=7 scale1=7.033 scale2=6.91 scale3=7.1 which is most accurate? also which is most precise?

many villages have water tanks that they use for farming Jeffs Village has a cylinder shaped water tank that has a 4M radius and a 9M High find the volume of the cylinder

Which model does NOT show a factored form of 8x2?

1. What is the solution set for x^2=100 A.{10} B.{-10} C.{-10,10} D.{100} 2. Which property will we need to use to solve the equation? X-10=5

An unknown number y is 12 more than an unknown number x. The number y is also x less than 17. The equations to find x and y are shown below. y = x + 12 y = - x + 17 Which of the following statements is a correct step to find x and y?

What two numbers multiply to - 216 and add to get 6

3X squared equals 108

1+1+1+1+1+1+1+1+1+1+1x0+1=

William's salary is £24 000 His salary increases by 4%. Work out William's new salary. £ ...