Acertain region currently has wind farms capable of generating a total of 2500 megawatts (2.5 gigawatts) of power. complete parts (a) and (b) below
a. assuming wind farms typically generate 35% of their capacity, how much energy, in kilowatt-hours, can the region's wind farms generate in one year? given that the average household in the region uses about 10,000 kilowatt-hours of energy each year, how many households can be powered by these wind farms?
y intercept is (0,1)
x intercept is ( ,0)
using 0 for x gives the y intercept
y = 2(0) + 1
y = 1
using 0 for y gives the x intercept
0 = 2x + 1
2x = -1
to find the intercepts, that is where the line crosses the x and y axes
• let x = 0, in the equation for y- intercept
• let y = 0, in the equation for x- intercept
x = 0 : - 15y = 60 ⇒ y = - 4 ← y- intercept
y = 0 : 3x = 60 ⇒ x = 20 ← x- intercept
b. equatorial radius of saturn is approximately ten times that of earth.
equatorial radius of earth = 6 × 10³ km
equatorial radius of saturn = 6 × 10⁴ km.
so, we see that,
equatorial radius of saturn = 6 × 10⁴ = 6 × 10³⁺¹ = 6 × 10³ × 10 = (equatorial radius of earth) × 10.
i.e. equatorial radius of saturn = equatorial radius of earth × 10
hence, we get that,
equatorial radius of saturn is approximately ten times that of earth.