Suppose a laboratory has 26g sample of polonium-210. The half life of polonium is about 138 days. how many half lives of polonium 210 occur in 276 days? How much polonium is is in the sample 276 days later?

19. Select other ways to write 50,897. Mark all that apply. A (5 X 10,000) + (8 X 100) + (9 X 10) + (7 X 1) 50,000 + 800 + 90 + 7 5,000 + 800+90 + 7 D fifty thousand, eight hundred ninety-seven

Peta attempted to solve the following equation. Explain Peta's error. x (x - 5) = 20 x = 20 and x - 5 = 20 x = 20 and x = 25

The water level in a pool is reading at a depth of 60 inches. It will decrease at a rate of 7 inches per hour. What will the depth be after 3 hours?

Heather purchased an iPad mini on sale 20% off for 263.20 what's the original price of the iPad mini

2. 3/4 y = x-6; x + 4/3y = 1

Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $ 136. Two adults and three children must pay $ 97. Find the price of the adult's ticket and the price of a child's ticket.

A. 1/3x b. 2x c. 3x d. 2x=1

Name the property 5x + 2 = 2 + 5x

Lori recently quit her job and decided to start her own company, which will sell makeup to small beauty salons. What should she do next in order to market her company successfully? a. Decide where her company's product will be soldB.

A glider flies8 miles south from the airport and than 15 miles east. Than it flies in a straight line back to the airport. What was the distance of the gliders last leg back to the airport?