What is 3.456e-7 in standard form and as a scientific notation

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units? (x – 3)2 + (y – 5)2 = 6 (x – 3)2 + (y – 5)2 = 36 (x + 3)2 + (y + 5)2 = 6 (x + 3)2 + (y + 5)2 = 36

Solve 2^x=32 and rewrite this equation in a logarithmic form

To determine the number of deer in a forest a forest ranger tags 280 and releases them back