Select all of the true statements (there may be more than one correct answer).
a. {a1,a2,a3} is a linearly independent set
b. {a1,a2} is a linearly independent set
c. {a1,a2,a3,a4} is a basis for r3
d. span{a1,a2,a3}=r3 e.
{a1,a2,a3} is a basis for r3 f.
span{a1,a2}=r3 g. {a1,a2,a3,a4} is a linearly independent set h.
span{a1,a2,a3,a4}=r3 i. {a1,a2} is a basis for r3

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?