Melissa walked at a rate of 88 feet per minute. what was her approximate speed to the nearest tenth of a mile per hour?
a 0.1 miles per hour
b 1.0 miles per hour
c 2.8 miles per hour
d 8.8 miles per hour

1 foot = 0.000189394 miles
1min = 1/60 =0.01667 hours

so 1foot per min = 1*0.000189394/0.01667  miles per hour
and 88 feet per min =  88*1*0.000189394/0.01667  miles per hour
                                =  1.0000003 miles per hour
which is equal to 1.0 miles per hour