What sound frequency hurts human ear not be able to detect? a.) 10,000 hertz b.) 10 hertz c.) 100 hertz d.) 1,000 hertz

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17

Can someone me with 6 to 10 plz this is for masteries test.