) Land bought for speculation is increasing in value according to the formula V = 1000e^3t. . The discount rate under continuous compounding is 0.09. How long should the land be held to maximize the present value? iv) The estimated value of a diamond bought for investment purposes is V=250000(1.75)^4t. . If the discount rate under continuous compounding is 7 percent, how long should the diamond be held? v) Cut glass currently worth $100 is appreciating in value according to the formula V = 100e^2t. how long should the cut glass be kept to maximize it's present value if discount rate under continues compounding is 12.7 percent ???? . percent