Which ratio is equivalent to the unit rate
30 miles
1 gallon
? how was the unit rate transformed into the equivalent ratio?
a)
3 gallons
10 miles
; by dividing the numerator and denominator of the unit rate by 10.
b)
90 miles
5 gallons
; by multiplying the numerator and denominator of the unit rate by 3.
c)
6 gallons
180 miles
; by multiplying the numerator and denominator of the unit rate by 2.
d)
180 miles
6 gallons
; by multiplying the numerator and denominator of the unit rate by 6.

a computer programmer worked 12 hours and earned $510. what is the hourly rate?
a)
$42.50
1 hour
b)
$47.25
1 hour
c)
$50.00
1 hour
d)
$41.25
1 hour

a furniture factory can box a desk chair in 15 seconds. what is the rate per minute?
a) 2 chairs per minute
b) 3 chairs per minute
c) 4 chairs per minute
d) 5 chairs per minute