2 1/2 million in standered form

Three coins are flipped. what is the probability that there will be at least two tails?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

What is the explicit rule for the sequence in simplified form? −1,−4,−7,−10,−13… an=4−5n an=−4−3n an=2−3n an=−6−5n