Suppose 2kg of a radioactive substance decays to 250g in 75years. what is the half-life of the substance?

What is 10 times larger than the 7 in this number 16372

Is the fraction 1/4 greater than 1/20

Renna pushed the button for the elevator to go up, but it would not move. The weight limit for the elevator is 450 kilograms, but the current group of passengers weighs a total of 750 kilograms.

What is the apparent solution to the system of equations? y=-2x+3y=1/3x-4

Adele and Monte are discussing graphs with negative correlation. Adele claims that only graph B has negative correlation. Monte claims that both scatterplots have a negative correlation. Adele is correct because only lines may have a negative slope.

Doughnuts at one shop cost £1.40 each. Doughnuts at a second shop cost 15% more. What is the difference in the cost of doughnuts at the two shops?

Witch of the following is clostest to 6?

If he divided his land into square fields that are 1/2 mile long and 1/2mile wide how many fields will he have

1/2 (20) simplifies what?

0.6875 as a fraction