The mass of a lead atom is 3.44 × 10–22 grams. What is the approximate mass of 8.5 × 106 lead atoms? I will give brainliest to whoever has the best answer.

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

∠1 and ∠2 are vertical angles. ∠2 has a measure of 63°. what is the measure of ∠1 ? enter your answer in the box.