The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 150 grams of a radioactive isotope, how much will be left after 3 half-lives?

Caitlin has a movie rental card worth $175. After she rents the first movie, the card's value is $172.25. Aftershe rents the second movie, its value is $169.50. After she rents the third movie, the card is worth $166.75.

Simplify. - 4 (6-7x) = 52

56. What time will it be 46 hours after 9:30 p. m. on Friday? F. 7:30 p. m. Saturday G. 7:30 a. m. Sunday H. 6:30 p. m. Sunday J. 7:30 p. m. Sunday K. 9:30 p. m. Sunday

Morgan takes a walk almost every day. The graph shows the distance traveled after the number of seconds. Determine whether the function is proportional or non-proportional. Justify your response. The coordinates are (2,10) and (5,25)

does anyone know of any great and easy ways to understand factoring quadriatic equations and polynomials?

26%, percent of a number is what fraction of that number?

Fractions that are greater than 3/8

The scale factor of the dimensions of two similar wood floors is 5 : 4. It costs $352 to refinish the smaller wood floor. At that rate, how much would it cost to refinish the larger wood floor?

Write the equation of the line = 2 and y - intercept = - 7

Simplified form of 4x - (2 - 3x) + 5?