6) If $525 is invested at an annual rate of 5% compounded continuously, what is the amount in the account after 23 years?

Plz help?

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Nine more than four times a number is the same as one less than twice the number. find the number?