A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. Which represents the location of the submarine compared to sea level? Group of answer choices

-265 ft

431 ft

-225 ft

265 ft

The answer is -225ft.

Step-by-step explanation:

Descend basically means to subtract, and ascend means to add. So -245 - 83 is -328. Add 103 to -328 and you get -225.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0