Mathematics, 30.10.2019 03:31, Laners0219

Awhale descends 382.5 feet in 45 seconds. write an expression that can be used to find the average elevation change of the whale during its descent in, in feet per second.

Answers: 1

Show answers

Answers

The expression that can be used to find the average elevation change of the whale during its descent in, in feet per second is s = 8.5t

The formula for average elevation in feet per second is the speed of the whale in feet per seconds

Given the following parameters

Distance = 382.5 feet

Times = 45 seconds'

Calculate the speed

Speed = Distance/Times

Speed = 382.5/45

Speed = 8.5ft/s

Recall that s = d/t

d = st

s = 8.5t

Hence the expression that can be used to find the average elevation change of the whale during its descent in, in feet per second is s = 8.5t

Learn more here: link

answered: fromthebranch13

Part a) The expression is y=-8.5x

Part b) -51 feet

Step-by-step explanation:

The complete question is

A whale descends 382.5 feet in 45 seconds.

The whale's elevation changes at a constant rate.

Part a) Write an expression that can be used to find the average elevation change of the whale during its descent in feet per second

Part b) What is the elevation change of the whale after 6 seconds?

Part a)

we know that

Find out the unit rate

To find out the unit rate divide the total elevation by the total time

Remember that

The sea level represent the level zero

If a whale descends, then the elevation is negative (below the sea level)

$\frac{-382.5}{45}\ \frac{ft}{sec}=-8.5\ \frac{ft}{sec}$

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form

y/x=k or y=kx

Let

x ----> the time in seconds

y ----> the elevation in feet

In this problem we have a proportional relationship, because the line passes through the origin (For x=0, y=0)

y=kx

The value of the constant of proportionality k is equal to the unit rate or slope of the linear equation

$k=-8.5\ \frac{ft}{sec}$

substitute

y=-8.5x

Part b) For x=6 sec

substitute in the linear equation

y=-8.5(6)

$y=-51\ ft$

answered: Guest

first anwser choice.

step-by-step explanation:

the greater/less or equal to symbol (> or < with the line at the bottom) is a closed/filled in circle.

when multiplying or dividing by a negative on both sides you have to flip the inequality sign. this rule only applies to multiplying or dividing by a negative number in inequality equations. this rule is really important.

-5c + 2 _< _27

subtract from both sides by 2

-5c _< _ 27

divide both sides by -5

c _< _ 5.4

flip the inequality sign

c _> _5.4

the only possible answer that would match the simplified inequality is the first answer choice

5c+2< 27 i really do not understand this.

answered: Guest

The answer is -pie over 2

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 15:30, rina62

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?

Answers: 2

continue

Mathematics, 21.06.2019 17:40, kayleeemerson77

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

Answers: 2

continue

Mathematics, 21.06.2019 18:30, angelapegues20097

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Answers: 2

continue

Mathematics, 21.06.2019 20:00, quarrella

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Answers: 1

continue

Do you know the correct answer?

Awhale descends 382.5 feet in 45 seconds. write an expression that can be used to find the average e...