Which two statements best determine whether an engineering design is successful.

What is the measure of ∠m? 81° 65° 53° 98° answer plz

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?

Plz ! if the age of the lowermost layer of a rock sample is more than 2 million years, which of the following could be the age of the upper layers?