Determine whether the following events are mutually exclusive: Choosing a red card or a spade out of a standard deck of cards.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.

the answer is z7+8/5