If 40% of a radioactive substance remains after 20 years, what is the half-life of the substance?

A box of penut-buyer crackers was diverse evenly among 6 children. each child got 9 crackers how many cracker were in the box A. 54 B48 c38 or d36

Which balance is $86 more than the balance of - $47.90? A. $38.10 B. $-13.90 C. - $47.90 D. - $133.90. Show me how you solved it. And does it make sense?

Jackson is starting a summer lawn-mowing business to save money for college. He needs to determine how many lawns he can cut in one week. He plans to work 6 hours per day. He knows he can mow 2 lawns every hour. Use the work formula, w = rt.

what is 12/21 reduced to

Yesterday evening, Emily's journey home took 25% longer than usual, as she was stuck in a traffic jam. By what percentage was her average speed reduced compared to normal

What's the number of 6,007,200

Lisa has $15 in her piggy bank. How much additional money does she need to buy a game that costs $75?

Nadia bought 5 tickets to attend a spaghetti supper fundraiser at her school. The equation 5x = 32.50 can be used to find x, the cost of each ticket in dollars. Which equation represent the cost of each ticket.

Evaluate 3+jk+k^33+jk+k 3 3, plus, j, k, plus, k, cubed when j=2j=2j, equals, 2 and k=6k=6k, equals, 6

Use the Pythagorean Theorem to find the missing side. Round your answer to the nearest hundredth. 19 m 52 m