Adolphin 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.

part b: find the dolphins rate in feet per hour.

part c: find the dolphins rate in miles per hour.

part d: which unit, feet, or miles, makes more sense to use in this scenario, and why?

answer:

step-by-step explanation:

d = rt

part a : r = d / t

part b : r = 665,280 / 3 = 221,760 ft per hr

part c : 1 mile = 5280 221,760 ft = (221,760 / 5280) = 42 miles per hr

part d : i would use miles per just sounds cant really explain but i cant really answer this one. possibly because it is a u.s. customary unit for speed.

good evening ,

step-by-step explanation:

part a: rearrange the distance formula, d = rt, to solve for rate.

»» r = d/t

part b: find the dolphins rate in feet per hour.

»»the dolphin swims 665,280 feet in 3 hours then

»»it swims 665,280÷3=221 760 feet per hour

part c: find the dolphins rate in miles per hour.

»» 1 mile = 5280 feet then

»» r = 221760÷5280 = 42 miles per hour

part d: which unit, feet, or miles, makes more sense to use in this scenario, and why?

»» 42 miles per hour   vs   221,760 feet per hour

»» 42 can be quickly assimilated and assessed by our brains : )

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.