The half-life of radium-226 is 1620 years. How much of one gram of radium-226 will remain unchanged after four half-lives?

a) 0.125 g

b) 0.50 g

c) 0.0625 g

d) 0.25 g

How many shorts can be made from 6 yards of fabric?

Tickets to a play cost $4 in advance and $5 at the door. The theater club president wants to raise at least $400 from the ticket sales.

What is the solution to the compound inequality in interval notation? 4 (x+1) >-4 or 2x-4≤-10

I'm so confused and I need to know the answer to this question 6• (-1)

Is there another way to say 3.6 divided by 0.09

12 + 20x = 34 x = ? giup toi voi

The post office is 0.15 mile from Abdul's house. His school is 3/8 mile from the post office. If Abdul stops at the post office on his way to school, how far will Abdul walk in all?

Carlos operates a helicopter. Carlos decides to measure the rotational velocity of the helicopter blades. What would be an appropriate unit for Carlos's purpose?

You are replacing the roof on the house shown, and you want to know the total area of the roof

Since it's Wednesday, Buy for Less gives a 5% discount for purchases. The items in Rhonda's cart total $53.75. She needs to know the cost of the items with the discount. So, she multiplies 5% times $53.75 and subtracts the amount from $53.75.