Alexander B. answered • 09/11/15

Advanced Math and Science Tutoring and Test Prep online (SAT, ACT)

Hi Vivian,

1. Answer to the first question:

**h = 2A/b**(rather trivial)2. Answer to a second question could be found by solving the equation for x (money invested at 6%):

x*0.06 + (7,000-x)*0.09 = 510

0.03*x=120

**x=$4,000**The amount of money invested at 6% is $4,000

Best regards,