An equation is shown below:

(4x − 1) + (2x + 2) = 1

which statement shows a correct next step in solving the equation?

the equation can become 6x + 1 = 1 by combining like terms.
the equation can become 3x + 4x = 1 by solving the terms in the brackets.
the equation can become 3x + 4x = 1 by applying the associative property of multiplication.
the equation can become 6x + 1 = 1 by applying the distributive property.

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