(1 point) math 215 homework homework1, problem 1 what is the distance from the point (12, 15, 15) to the x-y plane? what is the equation of the sphere centered at (12,15,15) that touches the x-y plane? = 0. (note: your equation must be written as an expression set equal to zero, by moving all terms to the left hand side of the equation. do not normalize the radius term to 1.)

a) 15 units

b)

Step-by-step explanation:

Part a

x-y plane z = 0

The distance from a point to plane:

Part b

Where,

a = 12

b = 15

c = 15

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6