After six half-lives, what percentage of a radioactive sample will remain? a) 0%-1% b) 1%-3% c) 3%-6% d) 6%-10%

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Is the number of complete movements of a wave per second.