Lin rode a bike 20 miles in 120 minutes at the constant speed. how long did it take her to ride 6 miles

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?