$1,750 and investment account with 6.5 percent annual interest the money is left for two years how much interest is accrued

I'll give brainliest if you answer right : )

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams