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?

Mrs. Smith has 24 boxes of ornaments. Each box has 15 ornaments in it. She will use 185 ornaments on her tree this year how many ornaments will not be used?

Which of the following is equivalent to 10000 lb?

Add. (2x^4+x^3-4x^2+3) + (4x^4-2x^3-x^2+10x+2)

What would x be in 5x=55

Use the substitution method to solve the system of equations. y = 4x 8x + y = 18 A (8 B. (66) c. (2,8) D. (2, 2)

Two variables are always sometimes I never) correlated. 4. In the U. S., from 2004 - 2015, the correlation coefficient for the relationship between the size of a cell phone data plan, x, and the number of text messages sent, y, is r = + 0.97.

Mobile people moving company increased its number of employees from 22 to 27 what is the percent increase round to the nearest tenth of a percent

Don is planning on driving his car to a business meeting. The distance to the meeting place is 1243 miles. If his car gets 30 mpg, and current cost of gas is 2.79 per gallon, how much will he have to pay for gas alone?

An angle measures 143.4° more than the measure of a supplementary angle. What is the measure of each angle?

Thursday is ladies night at the slurp in Burt bar and Grill. All adult beverages are $1.25 for women and $2.50 for men. A total of 211 adult beverages were sold last Thursday night. If the slip and burp sold a total of $365.