In a plan for area codes, the first digit could be any number from 3 through 8, the second digit was either 0 or 4, and the third digit can be any number but 0. with this plan, how many different area codes are possible?

What kinds of numbers have an odd number of factors?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?