The value of 7mn to the 2power, for m = 3 and n = -2

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The following graph shows the consumer price index (cpi) for a fictional country from 1970 to 1980? a.) 1976 - 1978b.) 1972 - 1974c.) 1974 - 1976d.) 1978 - 1980

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m