Sylvester says that 0.2015 written in scientific
notation is 2.015 x 10^6. do you agree with him? explain
why or why not.

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?

Solve the inequality and graph 6j - 7 < 5

Evaluate the expression for the given value of the variable. ∣-4b-8∣+∣-1-b^2 ∣+2b^3 ; b=-2