40 POINTS Find the derivative with respect to x of the integral from 2 to x squared of the cosine of the quantity t squared plus 1, dt.

(see picture attached)

Answer choices:
– 2xsin(x^4 + 1)
2xcos(x^4 + 1)
– 4x^3 sin(x^4 + 1)
4x^3 cos(x^4 + 1)

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2