Kazimir stopped jogging at 8: 15. he started jogging 20 minutes earlier. at what time did kazimir start jogging?

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Could someone with number 1 and 2