What is 10 + 10 help please make it for the dog

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Write 37/22 as a decimal rounded to the nearest hundredth.

What is the value of -3/4 to the 4th power? -256/81 -81/256 81/256 256/81