math in and out machines

Ashley bought a Lathe drilling machine for $150. The machine value decreases by 2% each year. If x denotes the number of years and y represents the machine value, then write an exponential decay model to represent the situation. => y = 150 - 2% x or y = 150(0.98) x or ..

The rate of change of income produced by a vending machine is given by y = 3000 e 0.57 x , 0 ≤ x ≤ 5 where x is the time since the installation of vending machine and y is in dollars per year. Determine the total income generated by vending machine during the fir..

Two hundred bolts were selected at random from the production of 4 machines. The number of defective bolts are 4, 9, 12 and 3. At a significance level α = 0.05, find the chi-square test value and check whether there is a considerable difference between the machines or not...

A machine produces 24 items in 4 hours. How many items does the machine produce in 6 hours? => 40 or 36 or 38 or 32..

A company sold 4332 washing machines in a year. Round the number of washing machines sold to the nearest ten. => 4330 or 4350 or 4340 or 4320..

The cost of a machine decreased from $1800 to $1500. Find the percent of decrease in the cost of the machine. => 21.7% or 31.7% or 16.7% or 26.7%..

The knob indicates that the machine is 'ON'. What angle should the knob be turned to switch 'LOW' the machine. ( Turn in clockwise direction.) => 180° or 90° or 270° or 180°..

A factory produces two types of toys A and B with the help of two machines I and II. The two machines I and II can not be used for not more than 1 1 2 hours each to manufacture the toys. The toy A requires 1 minute of machine I and 2 minutes of II, where as a toy B tak..

The rate of change of the maintenance charges per every half-year of a machine is shown. Find the total maintenance charges over the 6 year life of the machine. => 25000$ or 25700$ or 25550$ or 20583$..

A machine can make 1,200 rugs in 3 hours. Which graph shows the relationship between the number of rugs produced by the machine and the time taken? => Graph 2 or Graph 3 or Graph 1 or Graph 4..