Find the distance between the points a(10, –9) and b(8, 7). round your answer to the nearest hundredth.
a.5.09
b.10.63
c.15.00
d.16.12

D = √( (x₂ -x₁)² + (y₂ - y₁)²)

x₁ = 10, y₁ = -9, x₂ = 8,  y₂ = 7

d = √( (x₂ -x₁)² + (y₂ - y₁)²)

d = √( (8 - 10)² + (7 - -9)²)

d = √( (-2)² + (7+9)²)

d = √( (-2)² + (16)²)

d = √(4 + 256)

d = √260        Use a calculator

d  ≈ 16.1245

d ≈ 16.12 units    to the nearest hundredth.

Option D.

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.