17. A team of divers assembles at an elevation of -10ft relative to the surface of the water. Then the team dives at a rate of -50ft/min. Write a rule that represents the team's depth d as a function of time t. What is the team's depth after 3 mins?

Question

johnweldon1993 · Answer

Well depth here...starts off at -10ft...since they are already at a level below the surface of the water....so you'll have a -10 in your equation

and the team dives at a rate of -50ft/min     ...this can be represented by -50t

so altogether you have

D (depth) = -50t - 10

And to solve for the depth after 3 minutes....you just plug in (3) for 't' :)

anonymous · Answer

Thank you :)

johnweldon1993 · Answer

anytime :)

anonymous · Answer

Do you think you could help me with one more problem?

johnweldon1993 · Answer

if I'm able to ...then yes :)

anonymous · Answer

Write a function rule for the area of a rectangle with a length 2ft less than 3 times its width. What is the area of the rectangle when its width is 2ft?

johnweldon1993 · Answer

Okay, well the area of a rectangle...is Length Times Width right?

anonymous · Answer

right

johnweldon1993 · Answer

And you know that the length...is 2ft less than 3 times the width...so

L = 3w - 2

Now it GIVES you a width (2ft) so you have All you need to solve for area

A = L * W
A = (3(2) - 2) * 2
A = (6 - 2) * 2
A = 4 * 2
A = 8

Make sense? :)

johnweldon1993 · Answer

AND, if you don't want to do all that equation stuff here....you could think about it

Width = 2
Length is 2 less that 3 Times 2

so length is 2 less that 6
Length is 4

Area = Length * Width
Area = 4     *     2

Area = 8

:)

anonymous · Answer

Okay I get it now Thank you very much :)

johnweldon1993 · Answer

like I said before..anytime! :)