( Will give brainliest to whoever answers the question correctly)

Step-by-step explanation:

a. Substitute d = 500 in the formula

b. As the depth decreases, the speed of the tsunami decreases because both quantities are directly proportional.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23