A submarine is descending to examine the seafloor 2,100 feet below the surface. It takes the submarine 2 hours to make this descent. What was the submarines speed?

1050 feet per hour.

Step-by-step explanation:

Going down, the speed was r = d/t

r = the speed.

d = distance which is 2100 feet

t = 2 hours.

r = 2100 / 2

r = 1050 feet per hour.

step-by-step explanation:

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)