Aiko is finding the sum (4 + 5i) + (–3 + 7i). she rewrites the sum as (–3 + 7)i + (4 + 5)i. which statement explains the mathematical property that she made an error using?
aiko incorrectly used the commutative property by changing the order of the two complex numbers.
aiko incorrectly used the associative property by changing the order of the two complex numbers.
aiko incorrectly used the identity property by combining the real number and the coefficient of the imaginary part.
aiko incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Uestion 1(multiple choice worth 5 points) (05.02)alex wants to paint one side of his skateboard ramp with glow-in-the-dark paint, but he needs to know how much area he is painting. calculate the area of the isosceles trapezoid. isosceles trapezoid with top base 12 feet, bottom base of 18 feet, and height of 6 feet. 72 ft2 84 ft2 90 ft2 108 ft2

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3