Phương trình nào vô nghiệm a. căn 3 sin2x - cos2x=2
b 3sinx-4cosx = 5
c. 2sinx - cosx = 3
d. tan x =1

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?