A dolphin swims 665,280 feet in 3 hours. Use the formula d = rt, where d represents distance, r represents rate, and t represents time, to answer the following questions. Show your work. Part A: Rearrange the distance formula, d = rt, to solve for rate. (2 points) Part B: Find the dolphin's rate in feet per hour. (3 points) Part C: Find the dolphin's rate in miles per hour. (3 points) Part D: Which unit, feet, or miles, makes more sense to use in this scenario, and why? (2 points) PLEASE ANSWER ILL GIVE BRAINLIEST AWARD!!!

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Step-by-step explanation:

Part A:

d = rt

Solve for r

Divide each side by t

d/t = rt/t

d/t = r

Part B:

665280 ft/ 3 hours = r

221760 ft/ h = r

Part C:

Change to miles per hour

We know 5280 ft = 1 mile

221760 ft/ h * 1 mile/ 5280 ft = 42 miles / hour

Part D:

We should use miles per hour.  The number of ft is too large and the in the US we usually think in miles per hour when we drive

it's

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!