A radioactive substance decays exponentially. A scientist begins with 160 milligrams of a radioactive substance. After 26 hours, 80 mg of the substance remains. How many milligrams will remain after 43 hours?

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

The area of square garden is 300m squared. how long is the diagonal?

What’s 8y+48 and factor each expression completely