Chris is spending the summer volunteering as a lifeguard. the other job he could have had was to paint houses for $440/week. his opportunity cost of life guarding this summer is:

a: $400/week
b: $440/week
c: $840/week
d: either $400 or $440/week
e: none of the above

How can firms use marginal analysis to determine the price of a product? a) profit maximization can occur when the marginal cost exceeds the marginal revenue. b) the total cost of production can determine the individual unit price of a product. c) marginal analysis can be used to determine at what price profit maximization occurs. d) firms can calculate the marginal cost of a product and set the price lower than the cost.

The nervous system is responsible for our fight-or-flight response.a.autonomicb.parasympatheticc.somaticd.sympathetic  select the best answer from the choices providedabcd

Will mark brainliest ! the two parking space configurations you'll see in garages and parking lots are a. low-angle and high-angle spaces b. high-angle and boxed spaces c. straight-in spaces and angle spaces d. left-angle spaces and herringbone spaces