Justin is going to invest in an account paying an interest rate of 4.9% compounded continuously. How much would Justin need to invest, to the nearest ten dollars, for the value of the account to reach $2,100 in 8 years?​

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)