.Write 3.4 · 10-4 in standard form

What is the standard form of -5x^2+2x^4-11+x^3+3x

How do i put 3(x+7) in distributive property

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2