What would be the radius r of a sphere of neptunium-237 that has a critical mass?

Marissa found that 12 of the 50 people she surveyed like lemon in their tea. How many of the 4,500 people in his town would you expect to also like lemon in their tea?

Which description can be written as the expression 6b+5

the temperature of dry ice is - 109.5°F this is 184.2°F less than the outside temperature. What is the outside temperature?

Simplify the following expression: 4n - m + 3p + 2m - n - p A: 3n + m + 2p B: 3n + 5m - 2p C: 5n + 3m + 4p D: 5n + m - p

There are 1 1/2 pounds of bricks in a bag. Each brick weighs 1/6 of a pound. How many bricks are in the bag? Write your answer as a fraction or as a whole or mixed number.

The Science Club has 35 members, 10 girls and 25 boys. What is the ratio of girls to boys in the Science Club? A. 2:1 B. 2:5 C. 5:2

The cost of petrol rises by 2 cents a liter. last week a man bought 20 liters at the old price. This week he bought 10 liters at the new price. Altogether, the petrol costs $9.20. What was the old price for 1 liter?

1. Which equation represents the linear graph? A) y = 2x - 4 B) y = 2x + 4 C) y = 4x - 2 D) y = 4x + 2

Mary has $500 in her account. She makes a $350 withdrawal, deposits $100, and then gets charged a $20 fee. How much does she have in her account? A) $180 B) $230 C) $290 D) $340

A function g (x) has x-intercepts at (1/2,0) and (6,0). Which could be g (x) ? g (x) = 2 (x + 1) (x + 6) g (x) = (x-6) (2x - 1) g (x) = 2 (x - 2) (x-6) g (x) = (x + 6) (x + 2)