Can someone please explain it to me ASAP??!!! Special First-order Linear Differential Equations

A cup of coffee has a temperature of 95.C when it is poured and allowed to cool in a room with a temperature of 30 C. After 1 minute, the temperature of the coffee is 90.C. Determine the temperature of the coffee at time t. How long must you wait until the coffee is 35C? T(1) = (Use integers or decimals for any numbers in the expression. Round to four decimal places as needed.) You will have to wait approximately minutes until the coffee is 35 C. (Do not round until the final answer. Then round to the nearest integer as needed.)