The half-life of a radioactive kind of lanthanum is 93 minutes. How much will be left after 279 minutes, if you start with 2,064 grams of it?

Why do you think the coefficient is called constant of variation?

Which of the following polynomials has zeros at x = - 4 and x = 7? 4x 2 - 7x - 11 4x 2 - 49 7x 2 - 4x + 28 x 2 - 3x - 28

Atticus wants to buy of a square yard of wrapping paper. The paper costs $2.40 per square yard. How much will Atticus spend on the wrapping paper? a.$1.60 b.$4.80 c. $7.20 d. $9.20

A local hamburger shop sold a combined total of 525 hamburgers and cheeseburgers on Monday. There were 75 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Monday

3x + 4 + 2x = 5 (x - 2) + 7

Every cupcake Jake bakes weighs 0.45 pounds how much will a box of 100 Cupcakes weigh

The surface area of the given cube is 150 square feet. a) 5 cubic feet b) 25 cubic feet c) 125 cubic feet d) 625 cubic feet

If x=7+root 40, find the value of root x+1by the root of x

The last time andy went bowling he had a mean score of 158 per game. After 3 games Andy has a total score of 473 He thinks he needs to score over 160 in game 4 to get a mean score greater than 158. Is he correct? Show a check of working

8*{[ (7+4*2-[ (11-7) * 4]}