what would 99 to nearest 10

The half-life of the radioactive elements unobtanium - 41 is 5 seconds. If 48 grams of unobtanium - 41 are initially present, how many grams are present after 5 seconds? 10 seconds? 15 second? 20 seconds? 25 seconds?

Y=6x+10 A - 6 B 6 C - 10 D 10

Marks job is to draw a map with a scale of 1 cm equals 10 km in actual distance of a stretch of highway is 78 km what is the length of the line segment he needs to draw on the map

Simplify 63 7/8 - 55 3/4

What is 4/7 / 8/15 equal to

What is the solution for - 3 (2x-4) = 4 (3/2x-3)

What is the largest temperature variation during the day?

5. Mr. Higgins bought a circular area rug that has a diameter of 72 inches. Which is closest to the area of the rug? Use 3.14 for pi

Alan travels 3/10 of his journey car. 3/20 by bicycle 1/12 by boat and walks the rest what fraction of the journey did he walk? If the journey is 140 km, how many km did he walk?

If you deposit $800 in a savings account that earns simple interest at a pate of 1.5% per year, how much interest will you have earned after 5 years?